Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bacd0779095275…

MALICIOUS

PDF

45.0 KB Created: 2020-08-13 23:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17ee769b58c5876bec77fe456fa5394e SHA-1: ec02b0954bc312900f1675c38377f3e28e452bdd SHA-256: 82bacd0779095275d7c6ef94c155571db2d52c1fd2557fc61bf639a9bb9f439d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=animate+cc+software+free', which is likely the ultimate payload delivery mechanism. The document body contains obfuscated text and URLs, further supporting a malicious intent to redirect users to potentially harmful content.

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=animate+cc+software+free
    • http://gonod.jasminemcmorran.com/uploads/1/3/1/3/131398348/gasemapav.pdf
    • http://files.lydiamartinstudio.com/uploads/1/3/1/6/131606144/652ffecfed11.pdf
    • http://files.legallyours.org/uploads/1/3/1/6/131637839/a75b915f15e3151.pdf
    • http://bawanem.psychological-approaches.org/uploads/1/3/2/6/132681513/64a8f2e0b6006.pdf
    • http://sagat.artworksvass.com/uploads/1/3/1/8/131856772/gabisutigen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6967/7474/files/86189740929.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/moker.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4339/files/first_10_amendments.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/petiten.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/dojakop.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/fundamentals_of_electronic_devices_and_circuits_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0793/files/vemalak.pdf
    • https://cdn.shopify.com/s/files/1/0438/5207/1074/files/czasy_teraniejsze_i_przesze_angielski_wiczenia.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/surabapexa.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/kejatorobojexixazujilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/vunebezelutog.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9494/files/78457583647.pdf
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/informatica_power_center.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/xumurerexaxazewow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/accounting_ledger_template.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_off00006506.bin
e153df3a36ab277ada9cf8d1c883c514f78b6250ebab0e47cc9f6b71687d3643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 4864 bytes
font_01_sfnt_off0000756e.bin
ad9977ddc05e96819efa96c8ae1be059a22c22e9b045b2656bfb90ccd9130a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756E 10348 bytes
font_02_sfnt_off00009886.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9886 4324 bytes

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