Decrypt Dharma-Encrypted File

I’m sitting on a single file that was locked by the Dharma ransomware family. The encrypted copy is in my possession, but I never received a ransom note and therefore have no details about the exact variant or keys used... (Budget: $250 - $750 USD, Jobs: C Programming, C++ Programming, Computer Security, Cryptography, Data Analysis, Data Protection, Encryption, Web Security)