Google deleted a support thread posted 3 days ago about this issue [0]. There are a few comments on a HN thread from yesterday [1] which mention this issue as well. A reddit thread is active on /r/google about this issue [2].
Something seems to have gone wrong at Google to allow so many fake results to pollute so many different search queries. There have been many discussions on HN lately about how the quality of Google's search results have gone down, but until now I've never seen them become a massive influx of possibly malicious spam.
[0] https://support.google.com/chrome/thread/147896848/i-have-untitled-google-search-results-on-almost-everytging-and-it-redirects-me-to-malware-website?hl=en-GB
[1] https://news.ycombinator.com/item?id=30086059
[2] https://www.reddit.com/r/google/comments/seio29/is_anyone_else_getting_these_untitled_google/