The cash was inside a box spring and police say it is connected to a pyramid scheme involving TelexFree, a Marlborough-based company that purportedly sold VOIP telephone service.
It was found earlier this month by investigators who had tailed a Brazilian man from New York. That man, Cleber Rene Rizerio Rocha, 28, was charged with conspiring to commit money laundering.
TelexFree had few customers and made most of its revenue from people buying into the company with a promise of payouts for posting online ads for it, prosecutors have said.
They were paid with money from new recruits, often friends and family of earlier investors. Almost 1 million people worldwide were swindled out of nearly $1.8 billion.