Bitcoiner Jameson Lopp speculated that the transaction "looks like an exchange or payment processor with buggy software" based on its transaction history. "The address in question that made the fee calculation error has the characteristics of a withdraw-only hot wallet from an enterprise," he wrote.
His observations were well-founded, as it later came out that the wallet belonged to the Paxos blockchain company, who attributed the overpayment to a bug. Luckily for Paxos, the miner who snapped up the outsized fee agreed to refund it.