Sites that use these exact keywords in their titles to attract clicks, often promising "free" or "fast" versions of premium software. The Hidden Risk
Which could log his keystrokes when he types passwords.
A real PDF ends in .pdf . If a site asks you to download an .exe , .msi , or .zip file to "open" a PDF, it is likely a virus.
Only download readers from official developer websites or verified app stores (like the Microsoft Store or Apple App Store).
Well-known tools like Adobe Acrobat Reader or Foxit PDF Reader .
