Malicious PDF — malware analysis report

Static analysis result for SHA-256 76874d8bffb54246…

MALICIOUS

PDF

33.6 KB Created: 2020-10-30 10:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2d8dd85080f2326d65ebd0ffcfa4f2af SHA-1: 315e51bfdbbeaf33b49a0eae8700befc1a57eb47 SHA-256: 76874d8bffb54246e63227a6c4f63356a20bac08e9a5a2b4a28017fa2bd99ac3
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains multiple links to a redirector infrastructure, which is indicative of a phishing or scam campaign. The primary lure appears to be related to 'Nikon coolpix p600 charger', directing users to a link farm designed to host numerous other PDF documents. The ML classifier strongly flagged this sample as malicious, supporting the conclusion that it is part of a malicious operation.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=nikon+coolpix+p600+charger In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_5f983988b93eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8773b49e620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5f8d152def9a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f888675dca77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f97d6b8ea6cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_5f994ce0ee2cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_5f8d500fab7b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412394/normal_5f96fe1b0d4a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f87cadede5a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_5f9bb6d4cc720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f8d2266752a1.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/25c834e7-afce-4ab8-aa24-644dbc6f38c0/sijenirejew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5046/4945/files/lofazalebotijudodusogolex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2587/3050/files/53358119058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1fd193e-4b7d-445b-88e7-3dd947946a33/ffxiv_messenger_of_the_winds_guide.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000456c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x456C 5412 bytes
SHA-256: 8d8c6d142e2dd13e44d16324bbd9e20826070cb010290c995c7304c8f463ce2f
font_01_sfnt_off000057df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57DF 10012 bytes
SHA-256: 97798c37012ed8227f7ddb7b0f3002f4f65e32179c891c81a699c729ac9f5e95

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