Your Canadian CC company is very wrong.
DRI AVAST means the product/subscription is from avast and Digital River handles the payment.
If your CC company is calling them a fraud, it is time to dump that CC company as they clearly have no clue what they are talking about.
Digital River is a fully legitimate payment processing company that handles financial transactions for a lot of other companies.
Some of their clients (not limited to) :
- avast
- Kaspersky
- Adobe
- HTC
- Bosch
- Vistaprint
- Logitech
- Microsoft
You might not recall it, but it is very likely the payment processor that you have used when buying a subscription for one or more avast products.
What (almost certainly) happened is that auto-renewal took place because you did not disabled it.
As has been explained numerous of times on this webboard, before the auto-renewal takes place you receive 3(!) mails from avast telling you about it and giving you enough time to disable/stop the auto-renewal.
If you don't do so, it will take place and you will get charged.