The PAK-DA is a Russian bomber project. It's first flight is planned for 2020, the introduction into the Russian AIr Force is expected for 2025 or later.
So far, there are no trustworthy images of the PAK-DA and you can find a lot of speculative pictures on the Internet. This model is based on the drawing shown in the English Wikipedia article
in August 2013.
This model has its wings swung back for a high-speed dash. It is also available in a variant
with wings spread for cruising.