Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9cecb04e6ce3e3…

MALICIOUS

PDF

42.3 KB Created: 2020-10-24 12:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 14b03f791a04d5a2672c0123a7f462d0 SHA-1: e1fc77c22c5d82b4d2207c67c7f4c6ce96b957d3 SHA-256: 3a9cecb04e6ce3e37fa5636587a43772be5d7376c91036f265d15094edd4fc37
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 critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ggtraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure users to malicious content. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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://ggtraff.ru/123?keyword=quitar+ojeras+fotos+android In PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/ribepodo_vajukesawe_wimipegiduwut_sivaxube.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5f8ca4f649bbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f874c9308868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_5f8e10c550c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_5f93c199a6021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5f8b5c544cb32.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/tinajabizoreguf/21081227053.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/90866048766.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/vawetigukegiwudi.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/tratamiento_neumonia_nosocomial_pediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/tropismo_tisular.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/chemistry_a_molecular_approach_3rd_edition_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/la_bella_bestia_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/90658322025.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/dental_bases_and_liners.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/calendario_2018_da_stampare_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/sanukefefawagoboja.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/gupudelixivalojadipoxoje.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/duzin.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/bronfenbrenner_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/naterijijefinanav.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/mofugilufavodom.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/arduino_tutorialspoint.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/carson_dellosa_math_4_today_grade_5.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_off00006806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6806 5008 bytes
SHA-256: f6a4ce3ad9202275e37250e433710f31de765053e202c5db91308081fe4bc1b9
font_01_sfnt_off0000791e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x791E 10180 bytes
SHA-256: 0e8e5fa1ae815ce083827c024ae8595a96e39c8f45ec3d4e6e72530f10232e15

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