Malicious PDF — malware analysis report

Static analysis result for SHA-256 afabd5a1bfd41710…

MALICIOUS

PDF

47.5 KB Created: 2020-08-04 18:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4af43872f84f5827ec8ddfe271b5c24 SHA-1: 7a3213aa9c7b268aef5ce5a8032a10cc9e84a24a SHA-256: afabd5a1bfd41710c9da05c5ab74ff5b54c5010842c74c5c40885282aa645ae0
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.cc/pify?keyword=2d+seismic+data+acquisition+pdf'. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to generate traffic or distribute content via numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirect URL and a benign-looking PDF filename, indicating a lure.

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.cc/pify?keyword=2d+seismic+data+acquisition+pdf
    • http://files.globalconnectionskenya.org/uploads/1/3/2/8/132814147/fb239.pdf
    • http://files.davidjensz.com/uploads/1/3/1/6/131607712/843d228e5bdda.pdf
    • http://lafuton.nathanielrichguitars.com/uploads/1/3/1/4/131437812/zamexogorasobo_tavexedimovuja.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/49108079362.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/63032353729.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/8134718304.pdf
    • https://cdn.shopify.com/s/files/1/0430/8313/7178/files/kerawiforegum.pdf
    • https://cdn.shopify.com/s/files/1/0433/8089/9991/files/94414241331.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/muvasosolezezekema.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86526592296.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/16170400919.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/kopobaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/pixovefiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/zitizigevusu.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_off00007d56.bin
e5037fb8085e12853412b1feaaa0d7612c29d31a04affb8b9962e3787fec7a54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D56 5336 bytes
font_01_sfnt_off00008f70.bin
3542f572b902df964cc3e892e1485c9689f466af29d8fcc03329e308a5adaf75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F70 9776 bytes

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