PDFs are still used to delver malware. Adobe gets picked on less often now since everyone has PDF readers in the browser but that just makes chrome the new target of choice (not that alternative viewers don't get attention too https://thehackernews.com/2024/05/foxit-pdf-reader-flaw-expl...) but what I see most often in malicious PDF files recently are just links to websites that contain malware since they can work no matter what your viewer is.
