This is the first official book of the Starfinder 2e series! It is compatible entirely with Pathfinder 2e, however it does seem to me that its better to use Pathfinder 2e content inside of Starfinder 2e than the other way around. Includes a bunch of ancestries and some feats for our favorite space-nazis-to-kill. I think the Space Pirates are really good! Enjoy!
in the archive file there was an .exe file it was telling me to run
You might have clicked on an ad. The only two files in the 7z archive are pdfs. Install ublock origin on your browser, do not activate any exe in any archive, its probably malware. Can you send a screenshot?