Nobody is immune to it, but it's a lot less common for sketchy websites to provide malware downloads specifically targeting Linux PCs. The market share is nonexistent, the average user is more technically inclined, and the desktop environment ecosystem is full of variations that make it difficult to develop a one-size-fits-all solution.

It simply isn't worth it for most malware creators to focus on Linux desktops. Servers are a different story, but that malware is planted by humans or automated intrustion tools.

That being said, none of this precludes stupidity. If somebody downloads Oppenheimer-1080p.mkv.exe and opens it in WINE, you can bet your ass that the ransomware malware will do its job just fine.