Albus Dumbledore explained in that Voldemort had a different plan in mind for his diary Horcrux than the others, and Lucius Malfoy was supposed to be a part of it.

Source: https://screenrant.com/harry-potter-movies-lucius-malfoy-diary-plan-cut-ruin/

In the 1970s, Lucius Malfoy joined the Death Eaters and rose through the ranks to become Voldemort's second in command.

Source: https://www.cbr.com/most-powerful-magical-families-in-harry-potter/

The Wizarding World website and unofficial fan sites provide additional information about Narcissa's backstory, including her role in Voldemort's network and her marriage to Lucius Malfoy.

Source: https://collider.com/harry-potter-narcissa-malfoy-movie-book-differences/

This would leave the despicable Lucius Malfoy free to own all the Dark objects he desired without pesky Mr. Weasley threatening his high status in the wizarding world.

Source: https://screenrant.com/harry-potter-movies-lucius-malfoy-diary-plan-cut-ruin/