Malicious PDF — malware analysis report

Static analysis result for SHA-256 6839204ea48fc1b3…

MALICIOUS

PDF

78.4 KB Created: 2021-01-25 02:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ce8702f5860da5fb75ef9408179c25bc SHA-1: af702ca0e8edd37092d580d6f1cf5ed8ce658d1f SHA-256: 6839204ea48fc1b3d871627ddbbb6c64a58119ab0bd93e82feb22a7c9ff70ee1
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-optimized and redirect to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The primary malicious URL identified is 'https://trafftec.ru/123?utm_term=kenshi+how+to+mod+armor', which is presented as a lure for a free download. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to drive traffic to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafftec.ru/123?utm_term=kenshi+how+to+mod+armor PDF link annotation
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/belulipisuwutup-nunorifema-finojakesigibaf.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/0003826.pdfIn PDF document text
    • https://kazawiluk.weebly.com/uploads/1/3/5/3/135384823/5180426.pdfIn PDF document text
    • https://luvokivimowef.weebly.com/uploads/1/3/1/6/131607407/felujewuxibikidireg.pdfIn PDF document text
    • http://art-practice.org/funny_sms_tones_and_sounds0cbsu.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/80290506676qf2t1.pdfIn PDF document text
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/sogaporifokenik-zukanevawabumib-talataf-jovanoloba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477886/normal_5ff0f4c16dee5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/begijufadi/managementstudyguide_motivation_incentives.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/c_programming_data_structures_and_algorithms.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/bsplayer_free_full_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/xalanukox.pdfIn PDF document text
    • http://nujexaraxeb.epizy.com/515171455.pdfIn PDF document text
    • http://pifazudiso.rf.gd/ninorekopebikifesal.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/vubesaxanuj.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/java_number_format_decimal_places.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/tourism_holdings_limited_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/delete_gmail_account_android_lenovo.pdfIn PDF document text
    • http://jipowefata.epizy.com/62862597980.pdfIn PDF document text
    • http://bolapapuziku.epizy.com/13038853299.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 4880 bytes
SHA-256: acf7950f5d4d40bb0fcd6cb45fe88209ce632b9a058461380a42332e79b1386f
font_01_sfnt_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 12104 bytes
SHA-256: 5f12c0215b74d231984fa5e27f7c12c82103ef45465d0bfc353c3629a3c7a9bd
font_02_sfnt_off00011c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3