Absolute subterfuge going on. This is not a scan of a document. It is a doctored image. You do not have this kind of clipping masks and layers from a scan. A scan is just a single flat image. This document shows digital manipulation. There is absolutely no good reason for the document to be like this.
I’ve also opened the PDF in Illustrator and there are some bizarre things here. I won’t conclusively say this is a forgery as I don’t know the particular scanning software used. Is it possible that scanning software can break parts of the image into different postscript elements?