This text is almost unreadable to me. The characters are actually touching one another, blending together.
If anyone wants more punishment, the rest of the document is here: https://ista.org/docs/1Aoverview.pdf
Also, relevant xkcd: https://xkcd.com/1015/
That kerning issue is so distinctive that I knew where the document was from from the preview snapshot which didn’t show the ISTA header. It is actually funny how horrible their Pdfs on their website are and how nobody cares to fix it.