Malicious PDF — malware analysis report

Static analysis result for SHA-256 071d746ef0fc3d9a…

MALICIOUS

PDF

42.3 KB Created: 2020-07-28 13:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b71d2d41e43f90759d22d5f4b9a2824b SHA-1: e45f78ca597e9eed96743bd48f6c944317f1ea9a SHA-256: 071d746ef0fc3d9a878cc7d3efead0bb19e7687cd66b3e28ffbafaf435a38a46
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, masquerading as a search result for educational material. One of the primary links, 'https://ttraff.ru/pify?keyword=go+math+grade+7+answers+pdf', is identified as a malicious redirector, indicating a phishing or malware distribution attempt. The presence of a large number of PDF links suggests a link farm or SEO manipulation tactic to distribute malicious 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.ru/pify?keyword=go+math+grade+7+answers+pdf
    • http://files.simixlaundrydetergent.com/uploads/1/3/1/3/131383329/jemag.pdf
    • http://files.shopbottledwaterdelivery.com/uploads/1/3/2/6/132682745/1522676.pdf
    • http://files.postopweekly.com/uploads/1/3/2/6/132683000/4942797.pdf
    • http://files.wellness-arch.com/uploads/1/3/1/6/131637226/63233d5ec2201d.pdf
    • http://files.neworleanshosts.com/uploads/1/3/0/7/130775429/nemukatobowal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3459/0875/files/51536197225.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/31920385782.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/31250710348.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/68639122814.pdf
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/fuzeruzeraxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/rovaxekadalup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/xawubapiguzoravawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6537/5908/files/rewawaluvurosel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0437/4141/3527/files/pagalopitokipozuzukad.pdf
    • https://cdn.shopify.com/s/files/1/0439/2324/3176/files/wewopirizipodiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/tarefupedurivamow.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_off00006688.bin
6a132ffeb637e18abf2ede5d338a180038e3e67206225d12ce2f655e0bc8219e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6688 5368 bytes
font_01_sfnt_off000078b9.bin
35ba36079d88deaea517dc29e54ec6d2e16c5daa6db591dfd739f52aefc2603b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B9 10344 bytes

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