Malicious PDF — malware analysis report

Static analysis result for SHA-256 511c02477ef3a6db…

MALICIOUS

PDF

43.4 KB Created: 2020-11-05 08:57:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 71cea0390d08a230bc7496bfff9f1b31 SHA-1: ee100b1124ac765489311322a9b3e547d84b1589 SHA-256: 511c02477ef3a6db7e64cba9a9a48be5c6b5e0e6ee1193f7ab69b33a60043461
124 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, disguised with a seemingly innocuous search query. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's a link farm designed to drive traffic to potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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/aws?keyword=summer+basketball+leagues+for+kids+near+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f9bbb058b44a.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/xemipir_xepiwopajo_lofijewuv.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/b2a15d724ce78c.pdfIn PDF document text
    • https://gebaxugore.weebly.com/uploads/1/3/4/5/134594027/tuwoniguruj-norokiji-lolejaje.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/tukiv_tenudokuxemu.pdfIn PDF document text
    • https://donibirumot.weebly.com/uploads/1/3/4/4/134463545/5727143.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://s3.amazonaws.com/fufaragebo/voluri.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/bsc_mathematics_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/dialisis_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/pathfinder_opposing_schools_of_magic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f15d0877-4200-4652-a6b3-60650905264d/ejercicios_de_porcentajes_sexto_basi.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_off00005ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA8 5416 bytes
SHA-256: f773732ce78817f90bc3aea8fd9d73292eca151a0b52a5f8fa5fd6f0e3500a01
font_01_sfnt_off00006df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF0 10724 bytes
SHA-256: 735d47ec2fd2f320cc48bc7ec018eb7832e6567eede97fc3cfaf4ff4b6148fff
font_02_sfnt_off00009296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9296 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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