This icon is a part of a collection of Przewieźć wózkiem flat icons produced by Icons8. Icons follow the guidelines of iOS, Windows, and Android and are designed by a single designer, guaranteeing the consistent quality. Both PNG and vector are available.
It's an icon of a hand-trolley manuevering two stacked boxes. The trolley is facing the right, as though it's being moved in that direction, and it's leaning a bit backward as though somone is pushing it forward.