Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a01cff15dcab36…

MALICIOUS

PDF

99.0 KB Created: 2020-10-27 19:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5585148b66793be65716b6acd0b9ba0f SHA-1: 74f2db19b13e65c69de4dac07fd436ade8ad3326 SHA-256: 66a01cff15dcab36d8b8a42a22631f6f8355a6c2e3eb9d5d5c59686439f13a73
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised as a search result for a product manual. The ML classifier strongly indicates malicious intent. While no scripts were extracted, the embedded URL is the primary indicator of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/123?keyword=kenmore+plus+electric+stove+manual
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5f92a746e4a43.pdf
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5f8eb0d0ca521.pdf
    • https://cdn-cms.f-static.net/uploads/4389366/normal_5f97a502c6b01.pdf
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5f95e129d50e7.pdf
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f8809ed9f287.pdf
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f964e90b44dd.pdf
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f8c9dcbc171f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b260000f-0b14-42e0-b057-cf782beb18bf/expose_sur_la_negritude_dans_balafon.pdf
    • https://uploads.strikinglycdn.com/files/40abc699-f2fb-48c9-afd6-4e633d285ae7/80079897150.pdf
    • https://uploads.strikinglycdn.com/files/581e3c64-d84a-421e-9dcf-e25202b9ac7d/37071764042.pdf
    • https://uploads.strikinglycdn.com/files/b8867bae-e633-44b4-a3bc-f8e9e08375cf/vixawifikapitepetiwobumu.pdf
    • https://cdn.shopify.com/s/files/1/0476/9316/8806/files/14290081127.pdf
    • https://cdn.shopify.com/s/files/1/0488/2772/8037/files/hyatt_legal_services.pdf
    • https://cdn.shopify.com/s/files/1/0496/7065/2061/files/61761923660.pdf
    • https://s3.amazonaws.com/memul/anteproyecto_ejemplo.pdf
    • https://s3.amazonaws.com/zetare/magizekeneramizakidin.pdf
    • https://s3.amazonaws.com/fedufiporara/oxford_word_skills_intermediate_vk.pdf
    • https://s3.amazonaws.com/vixuwogetiv/wasavaruxoxogoligifo.pdf
    • https://s3.amazonaws.com/rufonali/dikojunosavimokeruxulipik.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_off000144e8.bin
434851e8187f5e86cfab195a851873c384ca4bceb2a41a4d99c5081bcb73a185
pdf-font-stream PDF embedded font (sfnt) at offset 0x144E8 5108 bytes
font_01_sfnt_off0001563a.bin
eb467147ffe2ff471c385c272dd0bd507f66ff94b4be5ca8015359b36fea19fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1563A 12344 bytes