It is thought that anti-corruption unit FederBet will submit a report to Uefa this week which highlights irregularities in the betting markets.
The agency said it noticed suspicious activity among known match-fixing groups which operate in Asia.
However, it stressed that any allegations of match-fixing does not imply complicity on the part of Aberdeen.
The Scottish side made their return to European football by defeating Latvia side FK Daugava Riga 5-0 at Pittodrie.
The visiting side, who have never played in Europe before, also had two players sent off in the game.
It is not the first time Latvian football has been the subject of a betting scandal,
In 2006, the Daugavpils-based club Dinaburg were expelled from the national Virsliga league following proof of match-fixing and betting against the team.
The club's president Oleg Gavrilov and trainer Tamaz Pertia were banned for life as a result.
Dinaburg had been disqualified on similar charges in 2007.
Aberdeen are due to travel to Riga this week for the return leg of the tie.