Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85658f4afe1c927…

MALICIOUS

PDF

44.8 KB Created: 2020-10-27 11:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 56011ad8dd6eeb400c63c37cc577d9a2 SHA-1: 59faf983ce14863a25b9e663d4a08de23fa348f1 SHA-256: a85658f4afe1c927f2af8bc322a635f3a041625f19cb69dc95c8db97aee36b14
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL that appears to be part of a link farm designed to distribute other PDF files. The primary link, 'https://cctraff.ru/wb?keyword=wiseguy%20book%20pdf%20download', is presented as a search result, likely to entice users to click and download further content. While no scripts were extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/wb?keyword=wiseguy%20book%20pdf%20download In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/xegupof-pajun-wemimimof.pdfIn PDF document text
    • https://kajukuka.weebly.com/uploads/1/3/4/3/134307777/kedavij-towuwolusube-zuwupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6631/3886/files/72620608604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1530/2043/files/diffusion_practice_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9140/2146/files/fundamentos_de_formulacion_y_evaluacion_de_proyectos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6306/files/deep_sleep_guided_meditation_rain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ecddf60-f767-4411-a162-0f9356b354eb/23947928576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877197d8-23ca-468f-b13f-296134dc23ce/40325929880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d461ab36-d7ba-4dc1-b830-25b8c74694e7/81898109735.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/jakevamigaxafurubefarif.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/lazuki.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/827903250.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/vowarakofafataliterivupe.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/az_203_dumps_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7616/9109/files/zigomokavukaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/82775437344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8890/6902/files/tomodibaxewot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d9e9a1-7647-45dc-9fcb-4cb82ad0dffc/pixozisixet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570baff9-27b1-4d87-8a25-4e85e572bbb8/beruvuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbcd80bc-a307-4cd7-872e-9ae1d27bcce2/92976571395.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_off00006df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 5524 bytes
SHA-256: 50157718f187a102e4dcf857a3f8199ccf31bcac0e347dee0db61bcd7208411f
font_01_sfnt_off000080f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F7 10700 bytes
SHA-256: 022234acfb681f61a6dfb9e867200bdb1367d54593e8b3aa8e43f5fa31e5b2c4

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