Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4c5bc7ace2c584…

MALICIOUS

PDF

44.0 KB Created: 2020-10-28 20:02:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5d0ec8c6cac850965d20cac6fd963489 SHA-1: 4a3796975655b39e8eabd45d98f1f7ef6b898ec3 SHA-256: ee4c5bc7ace2c5847b7eee843491820b309e216477a72d1f19eda81cb552b740
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ggtraff.ru'. It also hosts a large number of external PDF links, suggesting a link farm or SEO abuse. The ML classifier strongly flagged this PDF as malicious, and the embedded URL is directly associated with malicious redirector activity.

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/strik?keyword=features+of+land+as+a+factor+of+production In PDF document text
    • https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/sepowikit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f87012143fb7.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/fd714ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f94a178e8190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5f8a06e43fdef.pdfIn PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/3383612.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/8183358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f87fd10b62cd.pdfIn PDF document text
    • https://tifedufuzitiji.weebly.com/uploads/1/3/4/3/134353288/lijejuzudomarivevup.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/zirojopemup/comment_fusionner_deux_fichiers_adobe_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/jimotesemujuzegiwusaguga.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/bmw_x2_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/consulta_anticorrupcion_puntos.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/carrom_rules_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/nafixazinuvozobixol.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/sanonutugamekifofaluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4721/5000/files/make_america_grateful_again_flag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4274/8069/files/76609688196.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_off00006c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C85 5104 bytes
SHA-256: 5aedbf3772fd16588cfc5b8e3aa0fdf4c546cc5d326bf3c17c8c4c2901eecdae
font_01_sfnt_off00007df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF7 10796 bytes
SHA-256: f1df7457916e5e336b546b7a734f909a177b90aa3fcf3b0e85fe3c8a62f58bc3

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