fake iphone message help

iPhone SE ios 11

A few days ago I got redirected to a fake page from clicking a google search result (nothing dodgy, just a well known website, and not an ad). It's happened a few times since then, different sites. It's also happened via Reddit app clicking an imgur link (link was legit, no one else had a problem).

I've tried:

- Clearing browser history

- Deleting all website data (under Restrictions section)

- Resetting Network Settings

This has happened on WiFi AND on 4G/mobile data.

Here's a screenshot of the fake page, it's always the same cloudfront address:

iPhone is NOT jailbroken, doesn't have any dodgy apps or adblockers.