tl;dr: #TikTok "is essentially malware that is targeting children."
"... [There's] code on the Android version that allows for the downloading of a remote zip file, unzipping it, and executing said binary." https://www.reddit.com/r/videos/comments/fxgi06/not_new_news_but_tbh_if_you_have_tiktiok_just_get/fmuko1m/ (via /r/bestof)
(Inadvertently included a tracker in the earlier toot. My apologies. Cheers to @wizzwizz4 for the heads-up.)