Responding confirms that your number is active, which can lead to even more spam messages.
If there was a link associated with this text, clicking it could expose you to malware or phishing sites. Report the Spam: 540363a697a81af831671862184tty3ff8gkdzswvab9u7h...
For more tips on identifying these types of messages, the FTC Consumer Advice page provides a guide on recognizing and reporting "smishing" (SMS phishing). Responding confirms that your number is active, which