Malicious PDF — malware analysis report

Static analysis result for SHA-256 f102d6b8b9fb6291…

MALICIOUS

PDF

35.4 KB Created: 2020-08-12 12:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6f416d838fe6e065f74c37eecc8d304 SHA-1: 947c6948484b05c2c12d138d5cc79afc55d3996e SHA-256: f102d6b8b9fb6291d9e500e53b03dbe3097c09863f02ef72a861adbffd702e4f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=auto+insurance+application+pdf'. The document body, though partially corrupted, contains text related to 'auto insurance application pdf', reinforcing the lure. The presence of a large number of embedded PDF links, many hosted on cdn.shopify.com, suggests a link farm used to obscure the malicious redirector.

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.ru/pify?keyword=auto+insurance+application+pdf
    • http://files.newfypoozoo.net/uploads/1/3/2/3/132302924/bacf41.pdf
    • http://wazoxofa.lulalake.org/uploads/1/3/1/0/131069839/fevataxawa-takemelatemopej.pdf
    • http://taliraw.hartosteopathy.com/uploads/1/3/0/7/130776046/2378171.pdf
    • http://files.linyuaner.com/uploads/1/3/0/7/130776602/29a7bcbe158.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/51963433813.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/keel_kavacham_argala.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/zavuzinopos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/94247880840.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/vegizev.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6855/files/45186475715.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/61619271699.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fexofedome.pdf
    • https://cdn.shopify.com/s/files/1/0445/3344/8868/files/cazadora_de_hadas_jennifer_l_armentrout.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/12053489730.pdf
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/zuxubuputuxitovifa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/skin_creator_for_minecraft.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_off00004d5c.bin
4c47ddec2357923884599b435128db52ad5f96c18e1645d933ad449731140b83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5C 5140 bytes
font_01_sfnt_off00005edf.bin
f97a72976f7fe0dd78a90a02d009f8d861336b6dbf4b7d1e542f265de598a374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 9916 bytes

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