Many detections here on communicating files: https://www.virustotal.com/#/domain/zz.bdstatic.com
Read background info: https://blog.malwarebytes.com/detections/adware-graftor/
Where we stumbled upon it: https://urlquery.net/report/ae9c51be-4ca2-4156-b8c5-5b2f79823269
and detected adware: https://privacyscore.org/site/119231/
Consider: -https://zz.bdstatic.com/linksubmit/push.js -. content see: https://aw-snap.info/file-viewer/?protocol=secure&ref_sel=GSP2&ua_sel=ff&chk-cache=&fs=1&tgt=enouYiNzdHx0W14uXl1tYGxbbmtzdWJtW3RgcHVzaC5qcw%3D%3D~enc
Security vulneralbilties 6 threats found: https://webscan.upguard.com/#/https://zz.bdstatic.com
Re: https://www.cvedetails.com/cve/CVE-2018-19540/ (through excessive server info proliferation vulnerability)
and SPDY protocol 3 vuln: https://support.f5.com/csp/article/K14059
Re: https://webhint.io/scanner/0edc96fb-df5b-431b-8c5c-708ff32e9f5b
polonus (volunteer 3rd party cold reconnaissance website security analyst and website error-hunter)