Malicious PDF — malware analysis report

Static analysis result for SHA-256 61deb958b2e38def…

MALICIOUS

PDF

43.5 KB Created: 2020-10-31 20:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2f7c3c7396a3c3c832db59447895b270 SHA-1: 07c45ea52b3ab0d4ac3ef60b6c8757eb077f0bd2 SHA-256: 61deb958b2e38deff09bb117874619e0a419784011f6b7b09af9d10ae5d54745
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/aws?keyword=brookstone+wine+opener+not+working, is confirmed as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier strongly supports the malicious verdict.

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/aws?keyword=brookstone+wine+opener+not+working In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5f96046e67f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5f8db9742a7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f96479ce1e8e.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/9516062.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/dirilo_rodejipope.pdfIn PDF document text
    • https://jiketajaw.weebly.com/uploads/1/3/4/4/134464131/f76f448e.pdfIn PDF document text
    • https://wemugevesusufe.weebly.com/uploads/1/3/4/4/134467109/karevedutufiseko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_5f8e49aa905db.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/xurukimajevod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f88b3b46215e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5f91ef8a87a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419826/normal_5f99ce372e093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/zuloturukevonekumuv.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/371j_article_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/lost_tribe_of_the_sith_savior.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/catalytic_hydrogenation_over_platinum_metals.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/game_apk_mod_offline_unlimited.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/giwexeti.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDB 4952 bytes
SHA-256: 650f580ed22b614c1cc243d84bddc2635908de310b977e5580af7b9cd7560f91
font_01_sfnt_off00007ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE2 9944 bytes
SHA-256: 8ed03724ed20829a78d50e96a026ff94357d69fc4a2fabb164b48f286cb399d0

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