Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb349f541034600e…

MALICIOUS

PDF

71.5 KB Created: 2020-12-23 19:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 698ba3c3f1fb1aeee7978461aba8304b SHA-1: 3f1d4c2f869053ba1cfae8c3d44b70f9aa79e88f SHA-256: cb349f541034600e614c85b56e437cc0adde76bb1d435a395f0c4a2e7db86662
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to redirector infrastructure designed to obscure the final destination. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'gettraff.ru', indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam pretext, further supported by the presence of embedded URLs. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious document designed to lead users to harmful sites.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/strik?utm_term=guild+wars+2+legendary+medium+armor In PDF document text
    • https://static.s123-cdn-static.com/uploads/4451754/normal_5fdfd3efac4b0.pdfIn PDF document text
    • https://gumakamatiz.weebly.com/uploads/1/3/4/6/134600955/nofiwux-pusofip-bifatusi-sedekunowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_5fb9130f9bcf4.pdfIn PDF document text
    • https://cdn.sqhk.co/lasotepana/gjghggl/metabank_storm_lake_ia_50588.pdfIn PDF document text
    • https://cdn.sqhk.co/zigimovovu/jjhaGgc/29277810521.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/venemawuj-noxaropuneze-nabadebotisi-susetidor.pdfIn PDF document text
    • https://cdn.sqhk.co/fojufifef/0Hhiigi/certified_internal_auditor_syllabus.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/ditiruz/wusaviduweriwolaxijul.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/sigulalifer.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/vaaste_audio_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/paytm_money_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3955e372-10a6-4f8b-b437-eefa4ffe74cd/diy_canister_filter_for_20_gallon_tank.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/wifi_calling_app_android_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/mignonne_allons_voir_si_la_rose_hatier.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/rizanofasupufavuravekekip.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_off0000c9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B3 5304 bytes
SHA-256: 8fed4f998c5e980d29d03508b0f2999a9e28938892bb1cd7221f2347994245f2
font_01_sfnt_off0000dbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB0 11352 bytes
SHA-256: 149cef823f8042a45618c13e09dd8adc54d54222f8f647fd29e8f56ad4424024
font_02_sfnt_off00010287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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