While Apple has yet to comment on the ruling, the top man on the FAS totem pole says that the company has been cooperating with the agency. According to Andrey Tsarikovsky, Apple has cooperated and has "has adopted the necessary measures to eliminate violations of the law and is pursuing a policy to prevent similar violations in the future." Apple could end up having to pay a fine equal to 15% of its sales in Russia.
Apple has the right to challenge the ruling during the next three months, but as we pointed out, the company has been mum on the whole affair. Thus, we have no idea whether it will fight the Federal Antimonopoly Service.
source: FAS (translated) via 9to5Mac