Not sure what engines this beast has but with Q engines, and I believe the 7R4G2, above about 25000' if you let the N1 drop below 60% air 'sipilage' out of the front of the engine. Now this photo looks like it shows an aircraft flying lower than 25000'. However if it was going much faster than a normal descent the same might happen, I dunno.
The one on the back of the wing I think is common to see, but you often see a sheet of condensation, perhaps for some reason we only see the outline on this photo.
The one on the nose? I dunno.