Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c481a79154a9b48…

MALICIOUS

PDF

44.9 KB Created: 2020-10-15 14:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 95b1338ee4b85fd5e20b5dd53559dd3a SHA-1: e5697ee24ac629b133a161077f6c493a76a607ee SHA-256: 6c481a79154a9b48a991f19406a2f8b4ff81d312bbdf40ad4238593ac2c6ffe8
124 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically 'ggtraff.ru'. The ML classifier strongly flagged this sample as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting the primary purpose is to drive users to malicious sites. No scripts were extracted, but the presence of malicious links is sufficient evidence 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 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://ggtraff.ru/123?keyword=poetry+analysis+template+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f8777c5505c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8723342c7fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f87ac37b1184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f87f9daa9ab1.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/f5d445.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/8331384.pdfIn PDF document text
    • https://site-1043876.mozfiles.com/files/1043876/20998832894.pdfIn PDF document text
    • https://site-1038365.mozfiles.com/files/1038365/wixezabomonenojexos.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/61457057699.pdfIn PDF document text
    • https://site-1043809.mozfiles.com/files/1043809/xigefosiji.pdfIn PDF document text
    • https://site-1043237.mozfiles.com/files/1043237/47575371471.pdfIn PDF document text
    • https://site-1043833.mozfiles.com/files/1043833/mupefizotigolasamafafu.pdfIn PDF document text
    • https://site-1048206.mozfiles.com/files/1048206/45574939984.pdfIn PDF document text
    • https://site-1038771.mozfiles.com/files/1038771/jevud.pdfIn PDF document text
    • https://site-1038511.mozfiles.com/files/1038511/tesikuwemikegerogez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6603/1257/files/figure_drawing_design_and_invention_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3253/3922/files/gobovinofoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/39371764307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3837/4553/files/dazn_tv_guide_germany.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4543/5030/files/scarborough_town_centre_immigration_office.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_off00007200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 5288 bytes
SHA-256: 01bf884a0871d64f7b1a5149641e07cf9cb84eb139c731a01e3663f687d9a877
font_01_sfnt_off000083e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E8 9948 bytes
SHA-256: 13943609dc143defd87b710be8858576a7ceda51d07e09c76607a4433828a099

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