Malicious PDF — malware analysis report

Static analysis result for SHA-256 4225e077e5cd1394…

MALICIOUS

PDF

58.3 KB Created: 2020-11-22 06:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2f4dd153a9342e3db9b74fe7bd625f00 SHA-1: 5bf969919a5c4dec285add60df5085ea49b4f475 SHA-256: 4225e077e5cd13941bd9941b0fbfe73710eb8845a7ab3de3fc28040f4c0506b9
196 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 was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users to potentially malicious sites, such as the one at `https://trafffe.ru/123?utm_term=paul+simon+ukulele+chords`. The document body, though heavily obfuscated, suggests a lure related to search terms, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?utm_term=paul+simon+ukulele+chords PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453098/normal_5fa0c355ce07a.pdfIn PDF document text
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/207482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_5fa4f1809e8ec.pdfIn PDF document text
    • https://mesedegusi.weebly.com/uploads/1/3/4/6/134600151/2b71212d336bab.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/3873592557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5fb2c123a06df.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/14086673109.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_5f973769d4054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_5fa783bb98d07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5f9785101aad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_5fb5b80de2537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452595/normal_5fa168b983654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

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_off0000aa6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA6F 5244 bytes
SHA-256: 91ddff020148011444114e59c26c7d4dd6f12bdc5058263b3174c8a0561c872b
font_01_sfnt_off0000bc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC18 9564 bytes
SHA-256: 0b5d462b33f4806ac06f754221796e41bea7d6ad87e78a94fe622b1a972b7422

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