: While a standard text-based PDF is usually small, scanned documents or those with heavy imagery can easily reach 90MB, especially if automatic compression is not working correctly on mobile devices [26]. Security and Messaging Risks
: Cybercriminals often send unsolicited texts with "download" buttons that lead to malware-infected files disguised as harmless documents [3, 4, 13].
: On a basic 10 Mbps connection, the same file will take approximately 72 seconds [30].