7 char vanity address. The "goog" is almost certainly just a coincidence. I can see someone wanting an address starting with 12345678, but why would they go for 12345678goog? There's no way it was deliberate.
Probability says it's very definitely deliberate. To get "goog" there, assuming any case would do (which is a little generous to your position) the chances of "goog" appearing after 12345678 are 1 in 29*58*58*29 which is 1 in 2.8 million.
I really doubt that's a fluke on a 12345678 address.