[andirk]

And several analytics type of tracking pixels on the page as well. Not a big deal nor likely controllable by the author.

[Zuiii]

I initially read this as there being tracking pixels in the PDF. I'm hate that I have to ask this, but are tracking pixels a thing in the PDF format? (Execluding embedded js, ofc)

Can PDFs be crafted such that they would ping remote servers when opened in most PDF viewers?

[ametrau]

It's the mit press who's publishing it no? I very highly doubt the author has access to tracking decisions made by the org putting the work out.