Malicious PDF — malware analysis report

Static analysis result for SHA-256 1066c6259e7531b3…

MALICIOUS

PDF

42.7 KB Created: 2020-08-02 18:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15b04a1bf4658165cb63a09f10da494e SHA-1: 8047e06e26b34c1ba367957de125ae487d4d4a4d SHA-256: 1066c6259e7531b3358d5594f910dc62a19e5feb6518e0ad66cfe95620eae601
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=mario+kart+7+unlock'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious content. The presence of a large number of links, many pointing to benign Shopify URLs, indicates a link farm strategy, likely to obscure the malicious redirector or for SEO manipulation. No scripts were extracted, but the PDF structure and embedded links strongly suggest a lure for phishing or malware delivery.

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=mario+kart+7+unlock
    • http://files.longviewpaws.org/uploads/1/3/2/6/132681219/xiduwitub_ledota_vivupelu_jivek.pdf
    • http://files.gaitwaychiropractic.com/uploads/1/3/1/1/131163723/a286f.pdf
    • http://files.gnbbarassn.org/uploads/1/3/1/4/131408502/9007833.pdf
    • http://files.dporganizing.com/uploads/1/3/0/8/130813325/jexus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/9408/0677/files/97707515788.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/44487718721.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8850/files/manal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/97171334685.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/84103689407.pdf
    • https://cdn.shopify.com/s/files/1/0436/6571/9449/files/14861873590.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/94199610812.pdf
    • https://cdn.shopify.com/s/files/1/0446/4774/3651/files/minecraft_command_to_keep_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0450/3060/4958/files/christopher_parkening_guitar_method.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/nakanexenilivupuruvamis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/xetepexapif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.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_off00005e1e.bin
168aa84c4183ad58fe9bb53f035481f45cfadf293364f3ecfca5c90de79180ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 4528 bytes
font_01_sfnt_off00006d92.bin
896e346ad87d884bd4fae74f557883da0827d66c37f3816a696f5de1c26a85de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D92 10036 bytes
font_02_sfnt_off00008fe0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE0 4324 bytes

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