Malicious PDF — malware analysis report

Static analysis result for SHA-256 688179bb1ef84fcc…

MALICIOUS

PDF

37.3 KB Created: 2020-08-31 06:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfdb6ea7f60159d2b16e24fcc18eb9c0 SHA-1: 3c034dc0e90f6bca76938b254ed5393ef98fb7b6 SHA-256: 688179bb1ef84fccffb962168e1cd7fda6fd6270439ef1e08394829641e6a92f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel users to malicious content. The document also features a large number of embedded links pointing to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, supporting the presence of these suspicious links.

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.cc/wix?keyword=crimson+girls+chikan
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/jurimutabawixigulolu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/zidifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/xorodumajinoduvomugarof.pdf
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/call_of_duty_pc_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0431/3029/0327/files/ronanebotumotukufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2530/0647/files/sinhala_astrology_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3713/files/spoken_english_grammar_exercises.pdf
    • https://static.usrfiles.com/ugd/003b86_23a229b353f440ad8b04d7e013512efa.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_f198ce42f4ed4e65a09f34863684b1e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bc36a9f5104486ca7fc52d0f3f10884.pdf
    • https://static.usrfiles.com/ugd/b8c837_b50ae81c0c974ae18ca70c8758801094.pdf
    • https://static.usrfiles.com/ugd/66c878_411c2840eb3b47989a4109836193f7ce.pdf
    • https://static.usrfiles.com/ugd/2d1648_8aa9ebbeee874c509adaa697aa4ef53a.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_cc61b2941eab4baab31ea30166a7c65f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046be.bin
858693a0a50b0e3cb2768a6f53101414937678981caa679c4f4716314f62e7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46BE 4088 bytes
font_01_sfnt_off0000552e.bin
f9689762b25f93b08fbcf4ae876cd0edb25570f1c6d54c0638d0436367838138		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552E 5184 bytes
font_02_sfnt_off00006698.bin
6e5b2155c6bc0624917828e07f4ace9a474dd6fc647474d2328fb1514a5176bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6698 9820 bytes

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