Think wallet is compromised

Had a notification from etherscan for an old wallet that I don't use any more. Only had a bit over $1 of ETH in it, but it's been emptied to an address 0xa3a7ddf2c93972dd949134d2c7d8ffeca45b9916 the address has had loads of very small transfers to it. Anyone else seen this before?

Bit confused how it happened. Haven't had the wallet in any software for a few years and the seed is only written on paper.