<p><a href=""></a></p>

[]()

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE document SYSTEM "CommonMark.dtd">
<document xmlns="http://commonmark.org/xml/1.0">
  <paragraph>
    <link destination="" title="" />
  </paragraph>
</document>

<p>[]()</p>

\[\]()

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE document SYSTEM "CommonMark.dtd">
<document xmlns="http://commonmark.org/xml/1.0">
  <paragraph>
    <text xml:space="preserve">[]()</text>
  </paragraph>
</document>

<p><a href="https://example.com/evil-link-for-seo-spam"></a></p>
<p><a href="https://example.com/evil-link-for-seo-spam">    </a></p>

[](https://example.com/evil-link-for-seo-spam)

[    ](https://example.com/evil-link-for-seo-spam)

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE document SYSTEM "CommonMark.dtd">
<document xmlns="http://commonmark.org/xml/1.0">
  <paragraph>
    <link destination="https://example.com/evil-link-for-seo-spam" title="" />
  </paragraph>
  <paragraph>
    <link destination="https://example.com/evil-link-for-seo-spam" title="">
      <text xml:space="preserve">    </text>
    </link>
  </paragraph>
</document>

<p>[](https://example.com/evil-link-for-seo-spam)</p>
<p>[    ](https://example.com/evil-link-for-seo-spam)</p>

\[\](https://example.com/evil-link-for-seo-spam)

\[    \](https://example.com/evil-link-for-seo-spam)

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE document SYSTEM "CommonMark.dtd">
<document xmlns="http://commonmark.org/xml/1.0">
  <paragraph>
    <text xml:space="preserve">[](https://example.com/evil-link-for-seo-spam)</text>
  </paragraph>
  <paragraph>
    <text xml:space="preserve">[    ](https://example.com/evil-link-for-seo-spam)</text>
  </paragraph>
</document>

<p><img src="https://example.com/evil-link-for-seo-spam" alt="   " /></p>
<p><a href="https://example.com/"><img src="https://example.com/image.png" alt="" /></a></p>

![   ](https://example.com/evil-link-for-seo-spam)

[![](https://example.com/image.png)](https://example.com/)

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE document SYSTEM "CommonMark.dtd">
<document xmlns="http://commonmark.org/xml/1.0">
  <paragraph>
    <image destination="https://example.com/evil-link-for-seo-spam" title="">
      <text xml:space="preserve">   </text>
    </image>
  </paragraph>
  <paragraph>
    <link destination="https://example.com/" title="">
      <image destination="https://example.com/image.png" title="" />
    </link>
  </paragraph>
</document>