Malicious PDF — malware analysis report

Static analysis result for SHA-256 76690daf54cbe42c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-13 22:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68f1eb18f5303ce9fd82d66b0f368584 SHA-1: 9c27151b4df140b2030ad44f14b3304f6f1acf63 SHA-256: 76690daf54cbe42c3a4b73f0e3d5abb176499e0771cc47f656bf8f4a88254005
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm infrastructure designed to redirect users to potentially malicious content. The primary redirector URL is https://ttraff.ru/pify?keyword=wedding+invitation+template+in+tamil, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a social engineering lure related to wedding invitations to drive traffic to the malicious infrastructure.

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=wedding+invitation+template+in+tamil
    • http://files.brickheadsmasonry.com/uploads/1/3/1/8/131858661/tulonuladegoxu_wikavilalizoja_binup.pdf
    • http://files.shepherdhills.org/uploads/1/3/0/7/130775102/b8e2fb28b1.pdf
    • http://files.katherinetiradoryen.com/uploads/1/3/1/4/131483097/lisuwifogoket-mozirabexipelej.pdf
    • http://files.ballroomdancebyangela.com/uploads/1/3/2/6/132681517/tiwovosolopowiso.pdf
    • http://sujadefuv.horizonsksu.org/uploads/1/3/1/4/131437246/4465344.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/school_of_the_seers_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/62790028015.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/37660914428.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/pip_install_matplotlib.pdf
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/53459282981.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/98490520553.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/alfabet_po_angielsku_wymowa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/lijejuwivipopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/32132571747.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/articles_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/72432002417.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/97403905466.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005350.bin
06a2885884cee473c2224ee9c185d2fc906ee0117d7bf3d7fd330ca23aef783f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5350 5076 bytes
font_01_sfnt_off00006495.bin
ec22848a48b0e6d4f4e370bac42e4088360242fd821e5107eda915f8405d9992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 10048 bytes
font_02_sfnt_off000086c4.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86C4 16164 bytes

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