Finding unique pairs in lottery tickets
try-with-resources

Since Java 7, you can use try-with-resources for safe and efficient handling of the underlying I/O resource.

return boolean

if (condition) {
    return true;
} else {
    return false;
}


This kind of code can be simplified as return condition.

Method names

Your naming can be better refined to reflect what they are doing. For example, getStatus can be renamed as hasUniqueNumerals, following the standard is/has prefix for methods returning a boolean. winningLotteryTicket can be renamed as countWinningPairs.

for-each loop

Your loop on c.toCharArray() can also be written as:

for (char current : c.toCharArray()) {
    charSet.add(current);
}


What's nice


You checked if the concatenation of the two inputs will give you 10 or more digits, returning false first if not.
You declared charSet as a Set rather than a HashSet and relied on generic type inference.