You've found a small violet satchel that appears to bear the mark of the Kirin Tor. Despite your best efforts, you can't seem to find a way to lift the flap and see what is inside, however. The note on the body of the adventurer where you found this suggests that it might be the property of Archmage Kir-Moldir of Dalaran. It might be worth your while to seek out the Archmage and return his property... and claim the promised reward.
No rewards listed.