Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fa58688907a567…

MALICIOUS

PDF

46.9 KB Created: 2020-08-06 06:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aacec2d5ededc4083608919f00859a4 SHA-1: b5daca1a8a85a0d7219fc6a014e0893705c046ae SHA-256: 63fa58688907a5676ebd5115c2b861499d926495657620ae39e36b070fb5d09a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=circle+of+fifths+for+guitar+pdf'. The document body, though partially corrupted, also contains this URL and numerous other links to PDFs hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability 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.cc/pify?keyword=circle+of+fifths+for+guitar+pdf
    • http://files.brianhendersonactor.com/uploads/1/3/0/8/130874329/01212fa13.pdf
    • http://files.socceriqeducation.com/uploads/1/3/1/3/131383791/kunasiserevaw.pdf
    • http://files.mitemplosagrado.com/uploads/1/3/1/3/131383255/1a29a9be209c6c6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/circulatory_system_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/53429047421.pdf
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/animal_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/99927611974.pdf
    • https://cdn.shopify.com/s/files/1/0430/6262/4405/files/35742469788.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/desiwuvejofobilezodukaxep.pdf
    • https://cdn.shopify.com/s/files/1/0440/3711/1958/files/juwibufojutoralaxil.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/dr_cindy_trimm_praying.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/venulunavize.pdf
    • https://cdn.shopify.com/s/files/1/0434/0164/2135/files/copy_and_paste_frown.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/4461837543.pdf
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/wow_classic_heart_of_the_wild.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/54097764088.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_off00006425.bin
21f00d7f3eca8826bbe77bbc8a5837605b344b07e9b3ce1c3524b088f946a70d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6425 5320 bytes
font_01_sfnt_off00007638.bin
a8ec7bfef5f4f76e33e9cab4a7ae895bcebebdc8704811da63562a53dbb4f09f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7638 10240 bytes
font_02_sfnt_off0000996f.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x996F 16120 bytes

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