Sndffm257267.rar -

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This file name appears to be a random string of alphanumeric characters, which often indicates: A temporary file from a download manager. An arbitrarily named archive from a file-sharing site. A potentially untrusted or malicious file. SNDFFM257267.rar

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If you suspect it might be malicious, please and run a full system scan with your antivirus software. SNDFFM257267.rar