I don't believe that's possible, the HubL documentation shows that it only takes two parameters:
The first parameter is the GUID of the CTA. This unique ID can be found in the URL of the Details screen of a particular CTA. The second parameter accept the following enumeration values:
justifyleft - adds text-align: left to the CTA wrapper.
justifycenter- adds text-align: center to the CTA wrapper.
justifyright - adds text-align: right to the CTA wrapper.
justifyfull - adds no justification to the CTA wrapper.
I also can't spot any filters that would help either.
What's the use case for just getting the URL for the CTA?
<a href="https://wvw.dinterweb.com/ebook-el-tiempo-la-mejor-analogia-para-entender-la-evolucion-del-marketing?hsCtaTracking=9ef5c543-11d6-453e-860d-50699c2a581e%7C0598f485-7009-4e92-a00a-0e14f4913c42">
<div class="dinter_cta col-xs-12 col-sm-12 col-md-12" data-paroller-factor="0.4" data-paroller-factor-xs="0.2">
<div class="col-xs-12 col-sm-6 col-md-6 img" style="background-image: url('https://wvw.dinterweb.com/hubfs/ebooks/ctas/analogia.png');"> </div>
<div class="col-xs-12 col-sm-6 col-md-6 info">
<p>Descubrí cómo utilizar el marketing para dar un paso hacia el <span>desarrollo empresarial</span>.</p>
{{cta('9ef5c543-11d6-453e-860d-50699c2a581e')}}</div>
</div>
</a>
In the first <a> element; I want to make something like: {{ cta('9ef5c543-11d6-453e-860d-50699c2a581e').link }} in the href attribute, not to copy all the url of the CTA redirect.
I do not know if I am explaining myself correctly.
The cta creator uses a richtext editor and the richtext editor has a source code editor. From looking at code I can see that you shouldn't have any issues inserting it into the source code editor of the richtext editor of a cta. This means you can create your parallax cta, very cool btw, and let the cta manager wrap it inside the cta. This way you don't have to try to tear the cta apart. If you do this make sure you set the cta style to 'no style' to clear any default styling. You can keep your css in your style sheet.