I dont think you can just restore a MDF file avoiding LDF from a full backup file.

Attach, detach will do. You should be able to attach the database with just the MDF file.

It will create one LDF file automatically for you with default size.

Found somthing for you, hope it helps.

--Step 1: Retrive the Logical file name of the database from backup.

RESTORE FILELISTONLY

FROM DISK = ‘G:\TransDB_Full.BKP’

GO

--Step 2: Use the values in the LogicalName Column in following Step.

—-Make Database to single user Mode

ALTER DATABASE TransDB

SET SINGLE_USER WITH

ROLLBACK IMMEDIATE

—-Restore Database

RESTORE DATABASE TransDB

FROM DISK = ‘G:\TransDB_Full.BKP’

WITH

MOVE ‘O1_SITEDB’ TO ‘J:\TransDB_Data.mdf’,

MOVE ‘O1_SITEDB_Log’ TO ‘C:\TransDB_Log.ldf’

/*If there is no error in statement before database will be in multiuser mode.

If error occurs please execute following command it will convert database in multi user.*/

ALTER DATABASE TransDB SET MULTI_USER

GO