Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fc96567bf06609…

MALICIOUS

PDF

43.7 KB Created: 2020-08-06 11:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68c83b175be3900c26040473eb471330 SHA-1: 81661ba489f35524797b2b4852de0c559296db9f SHA-256: 12fc96567bf0660927ee5586e7ea4067fad4e161187bf6b81c0716ebe100df84
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=rearrange+page+order+in+pdf, which is likely used to direct users to a malicious site. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=rearrange+page+order+in+pdf
    • http://files.metatalkcafe.com/uploads/1/3/1/8/131856992/liduv-vizalexap-nowisawitefuz.pdf
    • http://files.neoyouthelite.com/uploads/1/3/1/8/131857334/9684656.pdf
    • http://files.schoolrockspartybox.org/uploads/1/3/1/3/131383743/jejoz-fimaju-wuzajozidusovi-wonizanuligozoz.pdf
    • http://gokebad.authorplblair.com/uploads/1/3/1/3/131379833/ada3eb2c4.pdf
    • http://files.philthyturtle.com/uploads/1/3/0/7/130776250/9344177.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/html_input_disabled.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7107/files/auriculoterapia_libro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/can_t_hurt_me_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7304/3622/files/41567614433.pdf
    • https://cdn.shopify.com/s/files/1/0434/0318/2231/files/onan_generator_repair_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/71719513512.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9653/files/71288970627.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/91383357829.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/20879406211.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/interview_questions_and_answers_for_managers.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_off00006f95.bin
0502ffbe022fe09df9f3cdf3120d51f1cc2cd072c78a4763281956946a4318fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 5008 bytes
font_01_sfnt_off000080b5.bin
fdb88eadf90223b65cbe997567c46e1d92c5fffadf8200f74d3a3b5b8d7ae7a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B5 9736 bytes

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