Malicious PDF — malware analysis report

Static analysis result for SHA-256 966057b28b849d64…

MALICIOUS

PDF

52.6 KB Created: 2020-10-16 15:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2d60394631738f0bdf665afda07cbe3e SHA-1: 3c631925701412bf162fb9780b23b8d014a8fb7b SHA-256: 966057b28b849d64325d9c723f7841da398d15cf31cc79528149693318b6fbff
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains, indicating a link farm designed to manipulate search engine results or lure users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://gettraff.ru/123?keyword=accurate+gt06+gps+tracker+manual'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern is the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=accurate+gt06+gps+tracker+manual In PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/8e303116097d.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/3419276.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/7287942.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/vurikuwabufaz.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/sepavokokadudivazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f88b3cae1e2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f88d8e022a61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f876e4214a3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f876355a6cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f851aecd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f893d5621123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f87f4148f270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f8994b806d77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f870b2d5a57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f87620d4a4ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5ca530-04ff-46f6-af25-aab0637cf89d/62094567783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad7909b8-cbf2-4667-8924-cc6ae118b5d2/88105404238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c08ddd-af88-45fb-b827-5f8f0911e183/dajom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc035af-96a0-42ab-9e67-28e8c8e96592/jajikibomeredobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5d4e77-afd3-4f3c-a1d9-03827d04989d/nubiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7725/2760/files/22117806124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4891/4081/files/was_charles_i_an_absolute_monarch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6697/3598/files/outlook_not_syncing_with_gmail_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5624/2344/files/55752329105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9207/3376/files/materiales_de_construccion_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8440/1819/files/75312718645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0285/5064/files/ln_in_matlab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2641/6551/files/the_relatives_came.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_off00008e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8C 5600 bytes
SHA-256: 911c11202bb4fedcf6d1352538eb7b008d6a95e006b9ccca507e3f34b6974301
font_01_sfnt_off0000a17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA17E 10256 bytes
SHA-256: 205f2163329262e970d3dc1128ed7b3dea2e545070c2951bd671e42defd0ff9a

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