There is no easy way of doing it.

I am sure that database was not cleanly shutdown so you won't be able to use only mdf file to recover the database (sp_attach_single_file_db)

Do below steps.

• Run the command for MDF file and get the logical and physical name of Log file.

== I detached ran for pubs database files==

DBCC CHECKPRIMARYFILE('C:\Program Files\Microsoft SQL Server\MSSQL\Data\pubs.mdf', 3)

• Create a database with same physcial and logical file name.
• Stop SQL Server.
• Keep old mdf file on same location as of new database and rename log file.
• Start SQL Server.
• Database would come up in suspect mode.
• Since Log File will not be linked to the new MDF File you have to run DBCC REBUILD_LOG

  dbcc rebuild_log('dbname','New Log File NAme')

• THIS IS UNDOCUMENTED COMMAND.

• database will come into Single User mode

• Run dbcc checkdb and if there are problems then you need to restore from backup

HTH