Forensic PDF & Image Recovery

I have two PDF files and one image file that must be restored for legal documentation purposes. Unfortunately every obvious structural element is gone—the PDF headers, internal objects and streams are missing, no JPG/PNG signatures remain, and each file is now padded with unrelated binary data. I do not have any partial backups or earlier versions, nor do I possess details about page count, text, or other original structure.

I need someone experienced in low-level, forensic-style data recovery who can:

• Analyse the corrupted binaries at byte level (hex editors, PDF spec knowledge, ExifTool, qpdf or comparable utilities)
• Reconstruct as much usable content as technically possible or, if total recovery is impossible, produce a concise report explaining why and documenting all attempted methods

The work is strictly for a legal matter, so chain-of-custody practices and precise documentation are essential. Please outline your approach, the tools you intend to use, and an estimated turnaround time.