Malicious PDF — malware analysis report

Static analysis result for SHA-256 4453f46fc7617da2…

MALICIOUS

PDF

85.9 KB Created: 2021-01-13 19:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 9e6e44c24b6faa702d0ba03fb16fd414 SHA-1: 2f1a6803489cb6916e19c547927d14944049609c SHA-256: 4453f46fc7617da280eb32aebd73dc20343b9f2b1ac1950cd7acc73cc08ee37c
254 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits critical heuristic firings for malicious redirector links and a link farm. The embedded URLs, such as 'https://gettraff.ru/wb?keyword=linear%20equation%20definition%20in%20simple%20language', point to infrastructure commonly used for SEO manipulation and phishing lures. The PDF structure and numerous external links suggest an attempt to drive traffic to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/wb?keyword=linear%20equation%20definition%20in%20simple%20language In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fbd09bc6bc7b.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/7aacfca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460071/normal_5fccc4f5dbdd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_5f97ec7c8907b.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/gXehbja/promised_land_landscaping.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/iMgijiV/strategic_planning_sample_ppt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454684/normal_5fafb96c2b2e5.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/1271183.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/hfiiI49/84527506785.pdfIn PDF document text
    • https://savakofanedekin.weebly.com/uploads/1/3/4/8/134872369/xidijanudan-faminaxutezo-wiseboreros.pdfIn PDF document text
    • https://site-1172175.mozfiles.com/files/1172175/fulikujadadev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413462/normal_5fd9656389ed4.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7D 5308 bytes
SHA-256: 416076a79afef3ea67cd6115998fc17bb0463df9ff8d359b10d0723d37a23c20
font_01_sfnt_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 12216 bytes
SHA-256: e00c1f4e47b26e9f0b6a135dbb88c2ddaa5111554252921ebfa97aa3824ef948
font_02_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 16196 bytes
SHA-256: ee53791bfaf84812ef43b5ee8d162477eec7e59b0229924a190bcf911819510b
font_03_sfnt_off00013c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C20 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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