Re: Coolness aside
‘Call me a boring old fart, but the whole point of PDF was supposed to be that it was as immutable as a paper document, didn't run code in the background, and is pretty safe to open.”
Oh dear sweet, sweet summer child… :-)
I have made quite a decent living over the last 12 years ago out of the fact that if you set out to design a file format specifically to act as a delivery vehicle for malware you’d be hard pressed to “improve” on PDF, and that’s just the documented bits working as designed before you consider the possibility of implementation flaws…
Seriously, have a very quick skim[1] through the specifications…
https://pdfa.org/resource/iso-32000-pdf/#pdf-1
https://pdfa.org/resource/iso-32000-pdf/
…and if it doesn’t make your blood run cold you’re either not looking properly or shouldn’t be working in the IT industry.
[1] Given the size of them more than the most cursory glance would be a big ask, but that should be enough.