Malicious PDF — malware analysis report

Static analysis result for SHA-256 8378238ffe76c777…

MALICIOUS

PDF

64.1 KB Created: 2020-11-25 05:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d66db9d12709c3cf38a3165449c39577 SHA-1: 2a114aae7c9879b1e05668a04c764aba022824c4 SHA-256: 8378238ffe76c777329f89d188d558679b8c44c54fe13733d161811a72ab34ef
252 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains multiple links to redirector infrastructure, specifically `ggtraff.ru`, which is flagged as malicious. The document appears to be part of a phishing campaign, using a lure related to '1984 book 3 study guide answers' to entice users to click the malicious link. The presence of numerous external PDF links suggests a link farm tactic to improve SEO and distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9472

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=1984+book+3+study+guide+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8703160619b.pdfIn PDF document text
    • https://noduxureravit.weebly.com/uploads/1/3/4/7/134743755/e9419f3667a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f98712070b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f87db202dfc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455370/normal_5fac5f4a612c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_5f9d6537c3368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_5fbcc9f4c507f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f8b3438b1b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467927/normal_5fb8ab4994ad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_5fbc9d84ba429.pdfIn PDF document text
    • https://kifisiwa.weebly.com/uploads/1/3/4/2/134266158/5bfe0.pdfIn PDF document text
    • https://sufimaxunexex.weebly.com/uploads/1/3/4/3/134345405/badf8d7ed946d85.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/6385baac-63bc-4982-b5de-8c4bf9e19fa2/lijipifibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e436b9cf-6e6c-4252-b200-670aa1943ab2/gelikelasavukekawewalik.pdfIn 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_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 5916 bytes
SHA-256: 67af292cfec3f190a12b26167a0b1e1662eb246ac35bb53945d42b8794a4a6f5
font_01_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 1636 bytes
SHA-256: b30d0ca848213b9ec921612c9cedbe9327dae9aaf874f51285f0c718a76d35f9

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