Safari Popup Prompting to Download "3887"

Description: A user reported that when opening [this article](https://www.theguardian.com/technology/2018/sep/07/tesla-chief-elon-musk-smokes-marijuana-on-live-web-show) in Safari, they received a popup asking, "Do you want to download '3887'?"

- User's iOS Version: 17.4.1


This issue appears similar to a previous report from another user, who experienced the same popup when accessing [this article](https://www.theguardian.com/commentisfree/2018/feb/12/government-spying-immigrants-america).

In that instance, the issue was linked to an email signup form that no longer existed, yet somehow triggered a download prompt.


Recent Action: Matthew removed the following iframe from the article as a potential fix:
```

```

Next Steps:
Attempt to reproduce this issue, particularly in Safari on iOS 17.4.1 and identify and implement a fix if possible.

Email thread link: https://groups.google.com/a/guardian.co.uk/g/dotcom.platform/c/iUuHdYMDWG8/m/wm0HEb_tAAAJ