If you are married but your husband is a non-resident alien without an SSN, you can file as Married Filing Jointly by following these steps:
1)Your spouse must apply for an ITIN (Individual Taxpayer Identification Number) from the IRS.
2)Attach a declaration to your tax return (as a resident alien or U.S. citizen) that your spouse is a nonresident alien, but they choose to be treated by the IRS as a resident alien.
3)On your joint tax return form, include your spouse’s name, address, and ITIN (in place of an SSN).
Whether it's beneficial to file jointly is unknown.
also see this IRS website
https://www.irs.gov/individuals/international-taxpayers/nonresident-spouse
