In an utterly groundbreaking revelation, cybersecurity researchers have discovered that hackers are now using PDFs in phishing campaigns to impersonate major tech corporations. Yes, PDFs, the bane of office workers everywhere, now double as double agents.

Instead of the classic ‘click this suspicious link’ routine, these emails are introducing the latest in cyber-vintage: call a phone number to experience scam artistry at its finest. We’re not sure what’s more surprising—the audacity of these hackers or the fact that someone still uses a landline.

Dubbed TOAD, for Telephone-Oriented Attack Delivery, this time-honored strategy combines the charm of a telemarketer with the inconvenience of a robocall. Next in line: smoke signals and telegrams. Is nothing sacred anymore?