I vaguely recall a story to that effect? Scientists finally receive a brief interstellar message of intelligent origin. After painstaking study, a breakthrough and finally they decipher it:
I was about to comment that it's somewhat similar to The Three Body Problem that's often discussed on hn's comments sections from time to time but decided to search for that last phrase and apparently it's from a /r/nosleep story:
https://www.reddit.com/r/nosleep/comments/2j3nxz/radio_silen...