**Agent ID:** a4eb79b **Date:** 2025-12-30 **Status:** Completed **Grade:** B+
Mission
Analyze the XRay ML model that processes audio embeddings and trace audio→embedding→network flow.
Key Classes Discovered
FBMediaAnalyzer XRay Infrastructure
| Class | Purpose |
|---|---|
| `FBMediaAnalyzerXRayOutput` | XRay analysis output container |
| `FBMediaAnalyzerXRayConcept` | Individual XRay concept/feature |
| `FBMediaAnalyzerProcessorBase` | Base processor class |
| `FBARXRayRemoteAssetsModels` | Remote-loaded XRay models |
FBInspirationCore XRay Processing
| Class | Method | Purpose |
|---|---|---|
| `FBInspirationEditorXRayProcessor` | `processXRayEditingAttachment` at 0x00060714 | Process XRay for editing |
| - | `_createXRayProcessorIfNeeded` at 0x000605d8 | Lazy processor initialization |
musicEmbeddingsForEditingAttachment Analysis
**Method Address:** 0x0088a528
This method is referenced in the audio→embedding pipeline but the class containing it was not directly resolvable via standard r2 commands.
**Related Classes:**
- undefined
ML Model Infrastructure
Model Files Found
| File | Location | Format |
|---|---|---|
| `aml_fd_model_v1.bin` | `FBSharedFramework/Unzipped/` | Binary blob (Caffe2/PyTorch Mobile) |
ML Framework Indicators
| Framework | Evidence |
|---|---|
| Caffe2 | `execNet`, `predictNet` patterns |
| PyTorch Mobile | Binary model format |
| No CoreML | No `.mlmodel` or `.mlmodelc` files found |
Embedding Flow (Reconstructed)
[Audio Input]
│
v
[FBMediaAnalyzerProcessorBase]
│
v
[XRay Concept Extraction]
│
v
[FBMediaAnalyzerXRayOutput]
├── concepts: [FBMediaAnalyzerXRayConcept]
└── embeddings: [Float array]
│
v
[musicEmbeddingsForEditingAttachment]
│
v
[Upload Pipeline / Story Publishing]Audio Feature Extraction
Spectrogram Evidence
While direct references to audio feature extraction methods were not found, the presence of:
- undefined
Suggests audio features are extracted before ML processing.
Network Destination
Upload Related Classes
| Class | Purpose |
|---|---|
| `FBStoryUpload*` classes | Story upload orchestration |
| `FBComposerPublish*` classes | Publishing with media |
| `FBDraft*` classes | Draft saving with embeddings |
Embedding Upload Evidence
The `visualEmbeddings` pattern was found, suggesting:
- undefined
Key Gaps
- undefined
Evidence Quality
| Criterion | Score | Notes |
|---|---|---|
| XRay infrastructure | 8/10 | Classes and methods found |
| Model format | 7/10 | Binary blob, needs reverse engineering |
| Embedding flow | 6/10 | Reconstructed from static analysis |
| Network destination | 5/10 | Indirect evidence only |
H3/H4 Impact Assessment
H3 Steganography
**Contribution:** +5% (embedding infrastructure supports data hiding)
H4 Network Exfiltration
**Contribution:** +3% (upload paths identified but not traced)
*SA-008 XRay Model Analysis - Generated 2025-12-30*