The polyfill.js is a popular open source library to support older browsers. 100K+ sites embed it using the cdn.polyfill.io domain. Notable users are JSTOR, Intuit and World Economic Forum. However, in February this year, a Chinese company bought the domain and the Github account. Since then, this domain was caught injecting malware on mobile devices via any site that embeds cdn.polyfill.io. Any complaints were quickly removed (archive here) from the Github repository.
This should be done with the new axis of evil and let them see how much they truly hate and “need” the destruction of the decadent West. Its insane their shenanigans are still being tolerated at all, cut em off and let them build their own self-sustaining economies and force the West to eliminate their dependance on mercurial and malicious actors on the world stage.