Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce0baff6b114248…

MALICIOUS

PDF

70.0 KB Created: 2020-12-23 06:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8fbc74528db1da56f0685f74697c5035 SHA-1: 17d990163f2bb351c098d058d46a84db7ab3c081 SHA-256: 5ce0baff6b114248d828fa08f3df172a1ef58b21b8f49fdaf94586c24d317672
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a redirector link to 'https://gettraff.ru/strik?utm_term=roku+tv+stick+review'. Another heuristic indicates a PDF link farm with 28 external links, suggesting a broad attempt to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://gettraff.ru/strik?utm_term=roku+tv+stick+review In PDF document text
    • https://zoforofutesabuw.weebly.com/uploads/1/3/4/7/134751738/ronit-bogosot.pdfIn PDF document text
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/2306861.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/f71210913.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/retobifulipo/carlos_castro_vs_cesar_juarez.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/59851696240.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/how_to_write_instructions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/vekonixijogexus.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/wisivodonugixujoxax.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lullaby_of_birdland_saxophone_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/breaching_the_tomb_wow_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/kuwimesugurogem.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/polikagazo.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/74249370118.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/laruxefelefos.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_off0000d773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD773 4776 bytes
SHA-256: 32956a6e27d5699a7379aef0a41e9e3f9a94d63b8557d8f52995ec40c8527839
font_01_sfnt_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 10304 bytes
SHA-256: 87ba9d7e7773d7a420317902b020085ae17b9dce71877e7e919980a3dfa6d3bc

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