Important note is the demo was never available for download through steam, only via the website of the listed developer. Valve/Steam have only removed the store page listing.

TechCrunch’s writer here just appears to be lazy as hell. Here’s a better article: https://www.thegamer.com/steam-gets-second-game-in-as-many-months-that-adds-malware-to-your-pc/

Honestly the Reddit thread is the best of the bunch though if you want more details