Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c02cabf2954031…

MALICIOUS

PDF

48.0 KB Created: 2020-10-11 15:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ec9e9c090a70f46fb3a1992d863cc645 SHA-1: c87ffb761ae3acdfb78e80203db918618d9b80ee SHA-256: 68c02cabf2954031b55e8e458cd0c91469beedeb38b41e51f1c9d40b1a46f816
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominently leading to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and references a 'digital forensics workbook website' to entice clicks. The presence of many external PDF links suggests a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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://ggtraff.ru/strik?keyword=digital+forensics+workbook+website In PDF document text
    • http://files.serenafineart.com/uploads/1/3/0/7/130740112/sewowiturib-vevig-merivaruma-gufomibenif.pdfIn PDF document text
    • http://files.christisobel.com/uploads/1/3/1/3/131398224/2182519.pdfIn PDF document text
    • http://files.yourgoalspt.com/uploads/1/3/0/8/130813768/resedonudiba.pdfIn PDF document text
    • http://mapamogij.honeybeeconsulting.org/uploads/1/3/1/4/131452824/c6c62d0262356.pdfIn PDF document text
    • http://files.mortgageinsuranceontario.ca/uploads/1/3/1/4/131482988/tipafelutirug_gujotes_barut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/4337194358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5273/5391/files/wubajopaxevesapigofami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2499/8819/files/48678259331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e31309a-52de-40d5-a7e9-d33909f4377d/lidanovibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e519d203-049c-488b-972b-ac509e9f18c3/85399225579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8363/1266/files/64718345380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/sonoma_cigarettes_customer_service.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7314/2933/files/basseterre_high_school_principal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2955/6131/files/2528137461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6881/2183/files/babyliss_pro_nano_titanium_flat_iron_ultra_thin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000692c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692C 5132 bytes
SHA-256: 9d218ca825b94d7771d9332e3a1f6e317804bde3e84c476ebbaa4e95578a120f
font_01_sfnt_off00007ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC6 13212 bytes
SHA-256: 92431748ac716f3589c99d160c7c24a9f4ee82769304517afd14fa1d1fdce1a2
font_02_sfnt_off0000a4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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