Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6de526986951a3…

MALICIOUS

PDF

45.7 KB Created: 2020-10-30 05:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d14c4a6c9443411896cc89c170791f4d SHA-1: ab104d8f260712bb54d9cd42d17bcae7529503af SHA-256: 3c6de526986951a354cb217405d9b997fda4abef32871ba910cd5ad5281a4987
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL `https://ggtraff.ru/aws?keyword=electricity+crossword+puzzle+answers+physical+science` is a strong indicator of malicious intent, likely serving as a lure to download further malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a typical document-based malware delivery mechanism.

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/aws?keyword=electricity+crossword+puzzle+answers+physical+science In PDF document text
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/2746394.pdfIn PDF document text
    • https://guburumo.weebly.com/uploads/1/3/4/3/134322172/letumexupaf.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/85f5a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_5f9b8b16796ab.pdfIn PDF document text
    • https://sesorefamasupuv.weebly.com/uploads/1/3/1/0/131071262/8656135.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/badisiw-xerasaxofug-sovoxafanopa-sodufejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_5f9639f59b48f.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/fomaralunex/xajijikawivabusuxawep.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/comics_el_botones_sacarino.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/indian_garment_company_profile.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/eicosanoids_synthesis.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/clases_de_ingles_gratis_para_adultos.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_off00007392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7392 5360 bytes
SHA-256: 2a60e0cb9b614b6f46b5300fe6b64e3afdb4e827192e31201309f654853b7ddc
font_01_sfnt_off000085e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E7 10476 bytes
SHA-256: c1cf95b4ece6b247dab6a5bce4c5f23221cf82b197113e759102c93de9b23ec2

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