Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b57dba7b02210a4…

MALICIOUS

PDF

36.0 KB Created: 2020-09-09 13:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a092db5a53eb25b5b80d9388c2dd225 SHA-1: a08ac9b454726f41a0516dd987b2b76601e3eb5b SHA-256: 7b57dba7b02210a424871d52a424bd1a8bff0276b83e9c0570fed936bdd18868
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, many of which are likely part of a link farm designed to improve SEO for malicious content. One prominent link, 'https://ttraff.link/wix?keyword=adobe+xd+website+design+templates', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious activity as a design template resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=adobe+xd+website+design+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/108936_9bd5828dbea4450791a20bb32deda09e.pdf
    • https://static.usrfiles.com/ugd/36f25b_4e3a5267ba334b249ac3bf112fe6e558.pdf
    • https://static.usrfiles.com/ugd/4c76bf_a4d75e68d37742b9a7263b09a60d154f.pdf
    • https://cdn.shopify.com/s/files/1/0429/4787/0876/files/watch_les_miserables_online_free_putlockers.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/dubuju.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/common_english_collocations_worksheets_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/early_renaissance_art.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/vupitewakir.pdf
    • https://cdn.shopify.com/s/files/1/0432/9734/1604/files/sapewotu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/pusafufijefulobi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3945/6423/files/13713178294.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/88560433160.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fea.bin
5050b0e1504eff7613358451bbe5d5e67eb19bf78bd1e7dd8eeaac7b6620481e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEA 5472 bytes
font_01_sfnt_off00007286.bin
6d1d4677c573d09d05e37cbae86436c9d566b3f663730c2806b653507a6430e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7286 9968 bytes

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