Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c29ab6c70f1497e…

MALICIOUS

PDF

51.6 KB Created: 2020-08-20 13:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9eb2f41f0829750f7f04ec0c9072908 SHA-1: 3962abcd4f348398f6588a244fe5f0ab84b06d78 SHA-256: 0c29ab6c70f1497e2203e848154dbeab3579e3f139994a379b86994323963427
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, suggesting an attempt to lure users to malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=jung+dreams+memories+and+reflections+pdf
    • http://files.rmpcg.org/uploads/1/3/0/8/130813108/borinofuj.pdf
    • http://files.jessica-elainephotography.com/uploads/1/3/0/7/130776791/kenopefutijive.pdf
    • http://files.nbptwedding.com/uploads/1/3/0/8/130813546/tetuz-rewiwowut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/93002638758.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/les_limites_des_institutions_de_bretton_woods.pdf
    • https://cdn.shopify.com/s/files/1/0432/7509/2132/files/sipolituxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/algebra_2_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0296/files/14673279767.pdf
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/english_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/83413573209.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/zumikazefetowoserafijewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/50955366378.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c5b.bin
8113eaef1451abb7d17e7a5f1fb62e466bc90b0bcd132be440d497137186bc80
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5B 5464 bytes
font_01_sfnt_off00009ed5.bin
59e172c1f83ab194a87939277469acdf2ddf6034ee7cace05da546cb2c765298
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED5 10120 bytes