The host at this IP address (172.217.20.84) is either operated by cybercriminals or hosting compromised websites that are being used to distribute malware:
https://adobepdf-com.uc.r.appspot.com/Legal_debt_recovery_process_pdf.jar
AS number: AS15169
AS name: GOOGLE — Google LLC
Hostname: ams15s33-in-f20.1e100.net