Malicious PDF — malware analysis report

Static analysis result for SHA-256 b72f5409c48c845e…

MALICIOUS

PDF

53.8 KB Created: 2020-10-31 14:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: da92e72809ea317f8da2221368e7926f SHA-1: 150c94a9c85d8b203ae4f9b35d004fa955ddd2c4 SHA-256: b72f5409c48c845e496583fdc773b0ef439806b48554e56b7359b1e7823bdd3d
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches one of the extracted URLs. The presence of a link farm on disposable hosting further suggests malicious intent, likely to drive traffic to malicious sites or distribute further payloads.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=colette+new+orleans+prices In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/nepezikinomajibaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_5f9a49a434325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f89aee944cfe.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/9839233.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/vorifakorebudi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb46aa08-6bd2-4b7a-b5a4-3b686c4d61a2/nirovexajoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6522/1535/files/luwuruzit.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/moranig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28adfbe0-f2b8-488a-a932-0850704bddb0/heritage_intermediate_school_phone_number.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_off00009401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9401 4924 bytes
SHA-256: 7df455e51d97f6f09713e6e0d9bf78d41d3d6a6b836777b59d49e865492aa06b
font_01_sfnt_off0000a4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4DE 11388 bytes
SHA-256: 8f9de16aa18252e9b04cd5e408307b656aaf5b3032256d18a983812acf772a3a

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