Considering the majority of users use Windows here, if one person received a trojan then chances are over 60% would have... and it doesn't seem like even one quarter of that is posting in this topic...
So, based on the statistics, it did not originate from Interpals. Furthermore, there still isn't any proof of where it originated from, nor was the trojan's name even posted.
If someone has anymore information, please post - though I feel it is highly unlikely that you received a trojan from Interpals.