Malicious PDF — malware analysis report

Static analysis result for SHA-256 9963b92b8be54b94…

MALICIOUS

PDF

40.7 KB Created: 2020-11-03 19:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a64533a94f29dee6b5447adcf349e683 SHA-1: 4e46ab892ab782107c778270b3d3bdbeef99670a SHA-256: 9963b92b8be54b94bed985442a75d751e0bbf3ce9d79df7430e793d4991f8385
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of external links, many of which are PDFs, likely to distribute further content or lead to malicious sites. The embedded URL https://cctraff.ru/123?keyword=pro+products+wi is a primary indicator of malicious intent.

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/123?keyword=pro+products+wi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5f8c69aeedb2c.pdfIn PDF document text
    • https://lavaseke.weebly.com/uploads/1/3/4/3/134383013/wogewijezen.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/dozuga/turuveleragavupoleje.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/kodimubikufepagapajike.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/single_phase_ac_circuit_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/bejeweled_3_for_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/fomafa.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/98338262946.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/bridgepoint_education_careers.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/bufogo.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/cartas_risk_juego_de_tronos.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_off000060b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B6 4920 bytes
SHA-256: 2b61ea1fe7b43b3ece92eea41cb6dfef599b13ecd67024e7fad36ae93b87d307
font_01_sfnt_off00007191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7191 10996 bytes
SHA-256: 310e6f71be64d6cd6ca9a7738d581f04dab2e47496d28ab4763eadf4da8daee1

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