Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff205250fdd0efaa…

MALICIOUS

PDF

127.9 KB Created: 2020-12-16 02:23:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6257102600a6d7135e4206d7a4f19abe SHA-1: 445efaf56f55b452cfbe3b294448d24efc71148f SHA-256: ff205250fdd0efaa61b5f5a963d437ed87cf0506eb2d5ea697bda128d61a19b7
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://traffine.ru/123?utm_term=tres+hermanas+davis'. This indicates an attempt to direct users to malicious sites, likely for phishing or malware delivery. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffine.ru/123?utm_term=tres+hermanas+davis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5fb73e46137e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f93e461ed064.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/fodizuduzob-viwafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5fd376e1daf53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f8759d3a0de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_5fbed92a57734.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/989a13a7-9335-4cb2-90d9-daac240bfed2/tibewowoburifaxani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a801a9c8-dde3-47e7-b72c-939c878a6f89/zikawafole.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0da75085bf90c0efcd65a/t/5fced7bafaf0bc04d1bb0756/1607391162722/10736932950.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13b47c14dfd36fef3b64a/t/5fc3c3dbeaf37e3b640f0288/1606665180409/11740017308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4711ae2-b73d-4630-b6d2-25883da3f61e/gesuripofoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b8ed23-8b51-4cd1-9868-cafa08327c33/68697564913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85cdf37-cc91-4c7c-b9ae-70895d69dcd0/59586481323.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55249c6d96458363f68a7/t/5fd04178125f6a657a4762d6/1607483769661/starz_free_trial.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_off0001b6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6D6 5040 bytes
SHA-256: 66c79f9618870d2a4cc0de9d96cccd82469db62b1678d514acd4d6928944a148
font_01_sfnt_off0001c7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7CF 12844 bytes
SHA-256: 147446c478fe5d3eb80d52ecd03c48e86d1db2e33adaef04ba4779d5d1178271

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