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Security & Protection

Safe Download Practices & Security Checklist

Downloading files from the internet carries inherent risks if caution is not exercised. Follow this security checklist before downloading or opening remote files on your system.

Disclaimer: Online URL validators and link checkers test server connectivity and HTTP status codes; they cannot scan the internal contents of third-party files for malware or zero-day threats.

1. The 6-Point Download Security Checklist

  1. Verify the Source Domain: Ensure the domain name in the address bar matches the official organization. Beware of typosquatting (e.g. paypa1.com instead of paypal.com).
  2. Inspect the Actual Extension: Malicious actors frequently disguise executable payloads using double extensions (e.g. contract.pdf.exe or photo.jpg.scr). Make sure your operating system is set to "Show file extensions".
  3. Never Run Unknown Executables: Never double-click .exe, .bat, .cmd, .vbs, or .ps1 files received from unfamiliar links.
  4. Keep Security Software Active: Always maintain up-to-date antivirus protection with real-time file system scanning enabled.
  5. Check File Sizes: A PDF that claims to be a multi-hundred page annual report but has a file size of only 15 KB may be an error page or a malicious script wrapper.
  6. Respect Intellectual Property: Only download content that is in the public domain, licensed under an open distribution agreement, or for which you have explicit rights.

2. What to Do If a Download Behaves Suspiciously

If your browser or antivirus software blocks a file with an alert banner, do not override the protection. Delete the downloaded file immediately, clear your browser cache, and verify the legitimate download source with the file publisher.