This attack poses a minor threat. Corrective action may not be possible or is not required.
PUA.Downloader are the Executable files which downloads unwanted application onto your system.
PUA and Adware are known to download and execute malware that can lead to system compromise and/or data theft.
Unless otherwise known, any unintended Potentially PUA.downloader Activity in this network traffic should be treated as Malicious. Actions should be taken to suspend and audit the communication and potentially block this network Activity from further communication.
If you want to block this network traffic, refer this link: