Unsolicited electronic messages frequently employ Portable Document Format files to deliver malicious content or deceptive solicitations. These messages often bypass traditional filters due to the difficulty in scanning the contents of attached files for malicious code or phishing attempts. The documents themselves may contain embedded scripts, links to harmful websites, or simply present fraudulent offers designed to elicit personal information from recipients.
The prevalence of this tactic stems from the perceived legitimacy afforded by the file format, often associated with official documents and professional communication. Its historical growth parallels the increasing sophistication of spamming techniques and the wider adoption of PDF as a standard document format. The use of attached files allows spammers to evade text-based filters and deliver more complex payloads directly to the user’s system. This poses a significant risk to individuals and organizations, potentially leading to financial losses, data breaches, and system compromises.