Party state secretary Kodiyeri Balakrishnan announced the candidate for the April 12 bypoll after the district committee meeting here.
Faizal is the state committee member of CPI(M)'s youth wing, Democratic Youth Federation of India, said the party.
The LDF would meet on March 20 and the party would form election committees next week, Balakrishnan told reporters.
Indian Union Muslim League general secretary P K Kunhalikutty is the Congress-led UDF opposition's candidate while the BJP has fielded N Sreeprakash in Malappuram.
Seventy eight-year-old Ahmed, who passed away on February 1 following cardiac arrest, had won the seat with a margin of over 1.90 lakh votes against his nearest rival in the 2014 polls.
Kunhalikutty is now the member of the Kerala assembly from Vengara and Sreeprakash is the district vice-president of the BJP.
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