that trade was a buy .... it was accumulated during the day at different prices and put in a lot to be sold right after the bell.... i'm amazed all these market pros couldn't answer your question .... they just looked foolish.... as usual.
i saw two blocks of roughly 7955.03 on bloomberg. the first one had an arrow going down then the next one would've been "at market." although after hours it is more difficult to say...either way...every trade has a buyer and a seller...so..to answer your question...both. :).