It is a design goal of symmetric crypto algorithms to produce an output that is indistinguishable from random with any reasonable effort. Thereby what you're a

It is a design goal of symmetric crypto algorithms to produce an output that is indistinguishable from random with any reasonable effort. Thereby what you're asking for is a compression algorithm that is so good that you can use it to attack AES. As long as we consider AES as safe that won't happen. (And I don't expect that AES gets anywhere near being broken within decades to come.)