Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1445a96a2bce0d…

MALICIOUS

PDF

85.7 KB Created: 2020-08-30 11:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be81321c1c4abe0835a66a5466d6687f SHA-1: 075c5cac0fd4f592919177b2984ad79ad87b6c96 SHA-256: 1f1445a96a2bce0d3de0e69a127540b18a86374c67cf7d16629a57b8de68d45a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=introduction+franchising+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=introduction+franchising+pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/69892879567.pdf
    • https://cdn.shopify.com/s/files/1/0429/6189/5587/files/84117294480.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2432/files/beechen_cliff_school_sixth_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5203/files/xegol.pdf
    • https://static.usrfiles.com/ugd/8d57bd_3e83bcde582645e0ab16a2a3aba46218.pdf
    • https://static.usrfiles.com/ugd/e73fea_f2292b511d6242a9a7636cda79629830.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a84e3cf8b1843ffa0db26a71b05c1a8.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_43203f877da64dc3a3f4cd028f0f28bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_e125ae4e91294d01ae199ca72fba06ab.pdf
    • https://static.usrfiles.com/ugd/90c678_5c68f02b909a43b293056341bc586036.pdf
    • https://static.usrfiles.com/ugd/b8c837_feaca2158ed345b5a23ce8cb5d1b11aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_92460ea311c6494fae54c155528fd7d6.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011298.bin
05a1279bebff87bf45cc1826b64f41b90b049dad32abd8a623a1f60c97cb5478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11298 5320 bytes
font_01_sfnt_off000124a9.bin
14a7536ea4b01ee5ce07b2570b5ccec7937432431664c6fab43b231b622de57d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124A9 10816 bytes

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