Malicious PDF — malware analysis report

Static analysis result for SHA-256 e939488359811f12…

MALICIOUS

PDF

42.2 KB Created: 2020-11-03 20:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 60e3d4e0963be5c7ba915024e6db2480 SHA-1: 1d4d8d0b60ba282d422e56c32fb67cdc2cc11718 SHA-256: e939488359811f1235b96809238612189a597882c2bae86a58a1aa342123e51c
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector, specifically designed to lure users with a fake download link for a "Ruger 10/22 manual pdf". The embedded URL, https://cctraff.ru/strik?keyword=ruger+10%252F22+manual+pdf, is known to lead to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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://cctraff.ru/strik?keyword=ruger+10%252F22+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5f8f7a1e8c7fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f988913b8056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407331/normal_5f9c5a6b511fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8709449c705.pdfIn PDF document text
    • https://mamotuzukaw.weebly.com/uploads/1/3/4/4/134438076/1247678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f8b9d010fb32.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/vamivemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418368/normal_5f982b28e6f76.pdfIn PDF document text
    • https://lokugejepotag.weebly.com/uploads/1/3/4/3/134318746/6150452.pdfIn PDF document text
    • https://xaruxetadelu.weebly.com/uploads/1/3/4/4/134478950/2546777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5f99cd358c1f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9327/0429/files/43387112468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb8bc69c-268a-41d7-a30b-182330475484/58839293678.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 8

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_off000062fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FC 5552 bytes
SHA-256: 30556203dd10446175a46b40508070d4a2fb03f056453e599952232077878c4f
font_01_sfnt_off000075de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DE 10784 bytes
SHA-256: 2e7944014798f49af3013d104b4e390e551c4e480f587a06e3b5d6db65996402

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