Malicious PDF — malware analysis report

Static analysis result for SHA-256 708bf91bf99c599d…

MALICIOUS

PDF

67.3 KB Created: 2020-12-04 11:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f7ce821dbb3616d3b47879fd704b218 SHA-1: b3d98c3b646ba38f13e88df0eab6a6e481a8b2cb SHA-256: 708bf91bf99c599dbe69b1f0c3173114c14dabe668b8b5ebe1d81505a8c3a670
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://cctraff.ru/123?utm_term=hebrew+for+loved+by+god'. While no scripts were extracted, the structure and the presence of malicious links suggest an attempt to redirect the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=hebrew+for+loved+by+god In PDF document text
    • https://wofenexezut.weebly.com/uploads/1/3/4/3/134310974/satuzejiru.pdfIn PDF document text
    • https://palokeligiz.weebly.com/uploads/1/3/4/4/134496709/cd1f998312af.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/julaxel/ropuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84646eb5-7559-44cc-b4e3-1a02ddee193c/butanesoraxaparesor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42deef83-1d0a-4ba5-9b4d-6ac2cd48c017/problemas_de_aplicacion_ecuaciones_l.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/mibenurafun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6249c7-8063-4e8a-9c87-67c15db573eb/vusetixovin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc321bf8787e879897a7fba/t/5fc5028da97599144e96b436/1606746772935/mi_prmera_encarta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da95ae3f-6870-4df0-88c9-fae77240bb0f/lulemuv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38c0cea4a794d5655cf02/t/5fc6d0c5a3696915e2119668/1606865099453/used_big_rigs_for_sale_near_me.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf0aaa97599144ebc9fc7/1606283434895/nukasovabatidupupujavid.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_off0000ccec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEC 5040 bytes
SHA-256: 8cdd4ed294069afd50f8630cacedaaf0edce3b1cf6e45515bbad730d5d922c79
font_01_sfnt_off0000de3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3C 10136 bytes
SHA-256: 50c684c10b27473fb924b24ea8a6fb829413934874aea8f8653219f308a4001e

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