Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac4a0d932756770…

MALICIOUS

PDF

54.2 KB Created: 2020-11-03 20:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 212be0acea0b82d9425daaca0d90b599 SHA-1: d356599da2f2184f40c547f85eaa526a32be9200 SHA-256: 1ac4a0d932756770f204379b0f6d7eab1f9e9b8f741e62af28162fd714792dc3
154 Risk Score

Malware Insights

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

The PDF document uses a lure related to educational material to trick users into clicking a link. This link, 'https://gettraff.ru/123?keyword=pltw+3.2+unit+conversion+answer+key', is identified as a malicious redirector. The document also contains a large number of embedded links, many pointing to S3 buckets, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or redirection attempt.

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://gettraff.ru/123?keyword=pltw+3.2+unit+conversion+answer+key In PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/wewuwokumapobo.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fadaxusak-nuruputixidipag-fupiwow-dekuwezom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f9eb3eeebea1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_5f9667725c234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416786/normal_5f98d287345d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f9c2612ad077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f8a92edec126.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/bawalidamovidud/zizekifarapubadonanode.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/dutebanizun.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/52048687043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13070e24-7e9c-4e0f-8263-af5103af66ac/kidipufema.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/fluid_overload_icd_10_coding_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8380d03d-f798-484e-919b-13094d027699/xukowuk.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/p90x3_elite_schedule.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_off00009009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9009 5440 bytes
SHA-256: 4639bfb3491692c640995e3120136d1966ed2c7c8a0d2de27dc6110322e5ae74
font_01_sfnt_off0000a2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BC 12176 bytes
SHA-256: c3e8a527f5cc63ee970297e7f6aa418cfbd37a8e25b82f8d92d7977fe16b530e

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