Examining PDF Files

Without understanding a bit more about what it is you're trying to determine, it's difficult to really make any recommendations.

For example, are you interested solely in the actual contents of the files themselves, or are you concerned that they contain malicious content?

For pointers to looking for malicious content, I'd suggest https://zeltser.com/analyzing-malicious-documents/

Without understanding a bit more about what it is you're trying to determine, it's difficult to really make any recommendations.

For example, are you interested solely in the actual contents of the files themselves, or are you concerned that they contain malicious content?

For pointers to looking for malicious content, I'd suggest https://zeltser.com/analyzing-malicious-documents/

Thanks for the quick response. I realize that my question is pretty open, but this is because I do not have any very specific suspicions. I do not think the files are malicious, but I do think that they may not be what they purport to be. I am looking for any way of gathering information about the files that might help me to confirm or deny this.

As I said, I already have the metadata provided by exiftool but wonder if there is any more that I might be able to do?

I do not think the files are malicious, but I do think that they may not be what they purport to be. I am looking for any way of gathering information about the files that might help me to confirm or deny this.

Maybe you can look at some of the analysis tools listed and try them out…list objects in the files, that sort of thing.

Good luck.

In various PDF viewers you can also view the document properties (File –> Properties in Adobe Reader). This will for the most part be a duplicate of the Exif information, but there might be something extra, like the security settings.

Late response, but you may want to look at Didier Stevens PDF utilities

Link pdf-tools/