If it is a probe, that thing didn’t send it. Rather, a “Dark Forest” hunter might have(1) ... you know the ones that make the Universe sound like it is uninhabited? Radio was a very bad idea, if that is the case - an advertisement that we are potential competitors and need to be eliminated.
(1) See Cixin Liu’s “The Dark Forest” for a through explanation of the Dark Forest Theory - the corollary to Fermi’s Paradox.