Malicious PDF — malware analysis report

Static analysis result for SHA-256 743fb4f7ac37e1a6…

MALICIOUS

PDF

63.8 KB Created: 2020-08-07 05:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e971b216353cd6b6b1cc909099b2b0c5 SHA-1: fb89422cc992c4b2681a9f541ada8523da23c4c5 SHA-256: 743fb4f7ac37e1a69a2c43d925e464b94e7a87924bdcb2d315afc1fbc0636fed
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.ru'. This suggests a link farm or SEO manipulation tactic to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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/wb?keyword=garuda%20puran%20in%20marathi%20pdf
    • http://files.newenergyera.org/uploads/1/3/0/8/130874612/1019597.pdf
    • http://files.johanneslindvall.org/uploads/1/3/2/7/132740343/3327708.pdf
    • http://files.pachecoathletics.com/uploads/1/3/0/8/130874326/fazirafizumez-tuwudedibum-jazivij-butabu.pdf
    • http://files.maidencovechildrenscenter.com/uploads/1/3/0/7/130776641/jafer.pdf
    • http://files.umsmofficial.com/uploads/1/3/0/9/130969305/xepitanem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/6272/1688/files/81398660108.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/commercial_aviation_safety_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/80128047369.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/90602389268.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/binodepoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/simple_bakery_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0435/9634/9602/files/87290555307.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/jegivutibut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/tijebozukudaravu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/berizikoviz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/pavedonezanumunalomezav.pdf
    • https://cdn.shopify.com/s/files/1/0434/9601/3990/files/sefowexawafudixu.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_off0000b01f.bin
e7792ffbc607d3ba993459fba402fdbaec74ee4d873a5a02d3915a68d9c38ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB01F 5100 bytes
font_01_sfnt_off0000c153.bin
427340e474dab1a174873db2549028168efb04c290126e7f897f540ba76bce79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC153 10648 bytes
font_02_sfnt_off0000e5b8.bin
2955112517d740ec4e7772fc88e51110bc1b31ad279dd3ae83eeac6e02546aae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 2924 bytes

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