I think you will still owe some atty fees, but maybe you don't need to totally drop your case.. There is a limited income you can earn and still get SSDI. It might be trickier to prove disability if you are able to work, unless minimal hours or minimum wage job..

You might contact that atty and tell them the financial situation and see what they say or suggest to you.
If you have your copy of the contract that might tell you if you can & how to drop a case.. But I'm sure some fees are expected for any work done so far..

Hopefully someone that knows the system & atty contracts better will chime in..