I've been getting these for a couple of months too. I don't speak Russian so I just picked a couple of common Cyrillic characters and created a filter that dumps any email with any such character in the spam folder.
What's more annoying than the emails is that I'm getting Google drive documents shared with me with in a similar format from Russian senders. There doesn't seem to be a way to block or spam sort Google drive docs.
Yes, recently I was getting notifications on my Android phone from Google Docs. Requests to approve doc edits or similar, but very obviously spammy. They seem to have stopped now.
What's more annoying than the emails is that I'm getting Google drive documents shared with me with in a similar format from Russian senders. There doesn't seem to be a way to block or spam sort Google drive docs.