Malicious PDF — malware analysis report

Static analysis result for SHA-256 023a05434188f64a…

MALICIOUS

PDF

41.0 KB Created: 2020-10-27 23:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d3d22e084540725eca5215cf7d9f22b SHA-1: 17ad1a539d32fa2fa0671cc97d0ae5986015c580 SHA-256: 023a05434188f64a407a07d8bc05459343f31e0a380d9ff26b75b743a10ee0df
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://gettraff.ru/strik?keyword=blood+red+road+pdf', which is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains this URL and other links, suggesting an attempt to create a link farm for SEO poisoning or to direct users to 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://gettraff.ru/strik?keyword=blood+red+road+pdf
    • https://cdn-cms.f-static.net/uploads/4390999/normal_5f944714e7f5c.pdf
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f8726de78e09.pdf
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f89fbaa9a1d9.pdf
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f91ba8139736.pdf
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f94f1964c825.pdf
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f877e5639653.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0487/0809/2054/files/spectrum_tv_guide_showing_not_available.pdf
    • https://cdn.shopify.com/s/files/1/0438/9447/2856/files/android_thread_handler_looper.pdf
    • https://cdn.shopify.com/s/files/1/0502/5723/2034/files/1043700248.pdf
    • https://uploads.strikinglycdn.com/files/e5aa2135-6838-4026-ab1e-3fb805eba76a/ficha_individual_acumulativa_preesco.pdf
    • https://uploads.strikinglycdn.com/files/c3851a72-7a3d-485b-b88d-1f2d5ba71145/22276990407.pdf
    • https://uploads.strikinglycdn.com/files/31589237-02dc-4dc9-a5eb-c3a534e85c2d/on_baking_3rd_edition_free.pdf
    • https://uploads.strikinglycdn.com/files/e0ee5f1e-3a1d-4e7d-b352-93c074e74a9e/96848050884.pdf
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/xututikifevowumevi.pdf
    • https://cdn.shopify.com/s/files/1/0497/6823/5169/files/telemecanique_inverter_altivar_31_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/1860/5976/files/puvadexakefes.pdf
    • https://cdn.shopify.com/s/files/1/0497/9248/3490/files/96128013532.pdf
    • https://cdn.shopify.com/s/files/1/0497/4048/0666/files/79740511101.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_off000061e3.bin
89ba725e37b677fba9759a59506540cb1fb4155a370924f2599b5faff7a4e79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E3 4908 bytes
font_01_sfnt_off000072a2.bin
6ddade966e3eb28283f30b0053f321e8a58753156bd3d2b6e419a62605ac2770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 10680 bytes

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