Malicious PDF — malware analysis report

Static analysis result for SHA-256 9459a34a4106bd04…

MALICIOUS

PDF

65.1 KB Created: 2020-12-16 19:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 800f6c45b33b193a99417257c08dd505 SHA-1: 74375454e4549abe919e8e10940c3fd592c251ca SHA-256: 9459a34a4106bd04c8f767f380b3ddaafeb1d6f43b32971969097bd4ffd29a53
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and it contains links to known malicious redirector infrastructure. The embedded links, such as 'https://gettraff.ru/123?utm_term=st+therese+southgate+ky+festival', are designed to redirect users to potentially harmful sites. The presence of numerous external PDF links also suggests a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/123?utm_term=st+therese+southgate+ky+festival In PDF document text
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/e15d62c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_5faef08db900f.pdfIn PDF document text
    • https://ravusosu.weebly.com/uploads/1/3/4/5/134589623/daxoralogowe_pusovitexu_losipudi_julididonazoko.pdfIn PDF document text
    • https://biwoponafi.weebly.com/uploads/1/3/4/7/134767969/951780.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/1a5d69.pdfIn PDF document text
    • https://doxigexuwalo.weebly.com/uploads/1/3/4/7/134708718/9026795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fa8738de0ac1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kudefem/kendo_grid_row_template_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/618d0c1b-6ee8-4b64-95be-e63f67254901/15306441192.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/parameters_in_crystal_reports_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/ligimezu.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/bretonnia_warhammer_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8259b70-af6e-4688-a760-f77437b36183/tosejafiba.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_off0000bf16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF16 5360 bytes
SHA-256: 890f49a61710a7ce41892363764df1aacd06ed5155efd64beefd11154bae4b72
font_01_sfnt_off0000d155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD155 10628 bytes
SHA-256: 2f22ea15f9bd4a823f19921b2045aec8c62b55ef3023935f06d80ce865f518ab

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