Honestly, I have no idea I find it weird why they sent that worthless amount to your wallet? It seems that Tron wallet users have also experienced this and actually not just Tron but also the Bitcoin wallet addresses I have a friend and he was also asking me why he also receives a small about of BTC from an unknown address and after he was checking the transaction he discovers that it was also sent to many random Bitcoin wallet addresses so I believe it was the same case of Tron wallet addresses but for what purpose Is it not related to a dusting attacked? I'm not sure about it it is a technical term so I just mentioned it.