It looks like someone has stolen your posting key and is now spreading phishing links from your account. Please follow these steps in order to secure your account:

1. Change your master password
https://steemitwallet.com/change_password

2. Remove or edit all phishing link comments that were posted from your account
In case you can't remove them, just replace them with a text like 'removed' or so.

If you don't follow the steps mentioned above, you will get blacklisted on Steemit! Thank you for understanding.