Reminds me a lot of this weird thing.
Live.http://www.justin.tv/rampageturke
Cow, furt, seben, numb, caft, cow, moo, seben, acht, nein
This is creepy, but probably fake if there is no known source.
This is audio recorded from a Swedish numbers station.
The article you linked to says that they are of unknown origin, so that's pretty creepy too.