Determine if document altered

I'm seeking a digital forensic expert who quickly and meticulously can identify alterations within a PDF document. The scope of this project remains undetermined due to me skipping a question. Therefore, I expect the freelancer to comprehensively examine all characteristics of the document.

Skills and experience needed:
- Profound knowledge in PDF encoding
- Prior experience in digital forensics focusing on document integrity
- Attention to detail

Your role would include, but not be limited to:
- Investigating the text content
- Analyzing the images
- Scrutinizing the page layout

Please note, this project is needed ASAP. If your expertise matches this brief, please feel free to bid.