If you haven’t noticed, that .pdf is an image file, not a text file, so what you said about capturing the text doesn’t apply.
Even if a document is scanned and converted to a .pdf text file, the font tends to be highly similar to the font of the original document. I know this because I’ve converted hundreds of pages to .pdf files.
You should have learned in the discussions about the Obama Long Form Birth Certificate that when you start with a form, then microfilm it, then convert that to a high density digital image, and then transmit that over the net, send it out to a gazillion others the same way, you do get some degree of damage, particularly if it started out on an old fashioned electric typewriter that used cotton ribbon and ink!
This copy isn't that bad but I've seen many just like it. You scan them and the downstream copy simply is not register perfect with the original.
We probably ought to bring in one of those guys to start busting it up into image areas and layers ~ prep us for the next birth certificate!