[theamk]

Presumably to see how attentive to details the candidates are?

I have worked with some people would would promise things and the immediately forget that they did so. This was extremely irritating. There are also people who never bother with conversation context when sending emails.

Asking for a trivial thing which needs to be done after interview shows the response to both of those questions. Will candidate forget this completely? Will they send an email with no subject or body and just an attachment alone?