While the "Hacking the System Design Interview PDF" is valuable, there are three dangerous traps.

Late one night, buried in a Reddit thread from 2019, he found a dead link. A comment that simply said: “The PDF is still out there. Search for ‘Hacking The System Design Interview.pdf’ on an old GDrive.” It felt like a pirate’s treasure map.

Why specifically search for a ? Why not a website or a video?