Malicious PDF — malware analysis report

Static analysis result for SHA-256 7451a36952ee06dc…

MALICIOUS

PDF

100.4 KB Created: 2020-11-09 02:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 38d9ac5ff209d9051acada4bee9b0870 SHA-1: cc98df243f72ba6c35d4c95237a447c98b3bb63e SHA-256: 7451a36952ee06dc9000a543c943d8764451f7c908c4b94534f1194c84330f05
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 numerous links designed to create an SEO link farm, ultimately redirecting users to a malicious URL. The primary redirector URL identified is https://cctraff.ru/123?keyword=m1+garand+manual+ww2, which is flagged as malicious. The document's content appears to be a lure, presenting itself as an 'M1 garand manual ww2' to entice clicks.

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://cctraff.ru/123?keyword=m1+garand+manual+ww2 In PDF document text
    • https://mijelowiwiloz.weebly.com/uploads/1/3/1/1/131163856/gexojoruremuxuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f8eb1709a17e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5f988e9c03c26.pdfIn PDF document text
    • https://vorenamu.weebly.com/uploads/1/3/4/2/134265490/jirena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f95d29c2dede.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/c45f7c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f8cb8c076921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f93b44bbd1b0.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/tenunud/bomisofejutedisebazuwopo.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/93544722815.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/13765851747.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A80 8968 bytes
SHA-256: 35af2ddd29bd02e4330bfb294bd84f9dd1fb84447a3528374a8966d4157eaa75
font_01_sfnt_off000148f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F3 5248 bytes
SHA-256: 30c7db193cd32cdb1ff87be2571f2a9f8b4ef90008dd779c37aed59e5bdba9a0
font_02_sfnt_off00015ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ADA 12860 bytes
SHA-256: 06cc72ba8b31493292ecbe3d1b1c2adad1a694c3625efb77247f86d4772e0272

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