Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3668b39f6d2141…

MALICIOUS

PDF

41.3 KB Created: 2020-11-09 15:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b34cf33f5fe6904f4f0e023a9bfe617e SHA-1: 3a2571bbc0181f7f3bbdcd52f603dab5f0dc0206 SHA-256: db3668b39f6d214187904bdb18613719c61073d8948400021fff3cd1dab2392e
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?keyword=schwinn+hitchhiker+recall'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body strongly suggests an attempt to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/123?keyword=schwinn+hitchhiker+recall In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f8a9549a5606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5f904c316968b.pdfIn PDF document text
    • https://peniluvemafoni.weebly.com/uploads/1/3/4/7/134705148/8900186.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/wabefosibalo-golurojepoka-fenozox-tisaveb.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/xumaparaxafa.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/bevarolimesale/puwigalitudojifinuzip.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/51585606409.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/green_run_high_school_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f4f184-9b9d-4a32-9f86-a1d1ffc543ca/gamejekikulawukodijot.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/sokitagafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31374905-6841-4ace-b184-9a017481bb8a/wijotovuvazawalurovog.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/mufobexexixevoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23795bb9-0e2d-4fa2-b5d6-040a4ec17314/loxadovidezijuzikuvuru.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_off000061d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 4968 bytes
SHA-256: bc1fcc36a50c6fd704253ec91c30edc96b694cbfce171d6e66fb30b564c5cd05
font_01_sfnt_off000072c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C8 11620 bytes
SHA-256: fac6bf314843f121d970b430c004d1d475bc7b3862fa6d41107a9ba8257696ca

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