Toast the dried chilies in a hot skillet until fragrant, then soak in hot water for 15 minutes.
Blend the soaked chilies, chipotle pepper, garlic, and vinegar into a smooth paste.
Season the beef chunks with salt and pepper. Sear in a hot skillet until browned.
Place the beef in a slow cooker with the chili paste, onion, beef broth, cumin, and smoked paprika.
Cook on low for 8 hours or until the meat is tender and easily shredded.