Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79f6af60c13176c…

MALICIOUS

PDF

41.5 KB Created: 2020-11-04 01:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0468798a9155f98e75cbf5613776d74e SHA-1: e4c6a53c99ed8eba3ba824a2d587be43159f4863 SHA-256: e79f6af60c13176c4dd99003a6ba509fd75e941db73ea0e36250d7be6ab87f99
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 directs users to malicious infrastructure. It also exhibits PDF_SEO_LINK_FARM behavior by including numerous external PDF links, likely to manipulate search engine results. The embedded URL 'https://gettraff.ru/aws?keyword=2d+driving+simulator+unblocked+games' is the primary indicator of malicious intent, likely serving as a lure to a malicious site.

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/aws?keyword=2d+driving+simulator+unblocked+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f8a070592512.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5fa0c3a1e2dbd.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/risalenefazozo/mike_s_huli_chicken_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2357acf-5d56-4016-b64d-89a52bd01264/nitonam.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/43571018696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c478d70f-0530-42d4-a59d-a812ab351162/2927647992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99f774e-a69a-401b-a18d-1ab24b86d087/fogenidafolilokonoxusen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6c2d8e-4ef6-46c8-a678-d9e9eb93d870/retetevixatomoziwonilane.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/quality_assurance_files.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/spectrum_math_7.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_off000062ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EF 5560 bytes
SHA-256: 05492ec4363aaf0cc13ee7536704d4c8e6a22d162de3048c19a2d7377ddb9dcf
font_01_sfnt_off000075d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D0 10336 bytes
SHA-256: 325fad0c7dea5321b032f349748bbc00f2d50e89c4bce595bcb8f24c68f47240

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