Looks like the PDF is just to show what the messaging interface looks like, and what they've found as a publicly available screenshot is from the crash report i

Looks like the PDF is just to show what the messaging interface looks like, and what they've found as a publicly available screenshot is from the crash report involving that plane. If they logged in, took a screenshot, and published that (even if lots of things are blurred), there's probably more attack surface for some three-letter-agency to bust down their doors and disappear them...