Samsung s7 pop-up ads to spam sites and random vibrations

As of yesterday my Samsung s7 is getting redirected to spam/contest sites on google chrome, even when on legitimate websites. on top of this, today while browsing chrome on it, the phone began vibrating randomly as if i were receiving a call. The vibrating stopped as soon as i exited chrome. I haven't installed any 3rd party apps or any strange play store apps. could it be possible that a site i visited planted this on my phone?

I have tried -

- Factory resetting the phone
- deleting all cookies in chrome
- resetting ad ID on my google account

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