What is Trojan.GenericKD.70620667?

Getting this notification once a day for the 2nd day in a row. Running the System Scan picks up no issues. Is it okay to delete the file or leave it alone?

The file C:\Users\AppData\Local\packages\microsoft.windowscommunicationsapps_8wekyb3d8bbwe\LocalState\Files\S0\4\Attachments\#359-19173-3843956[243].pdf is infected with Trojan.GenericKD.70620667 and was moved to quarantine. It is recommended that you run a System Scan to make sure your system is clean.

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