Malicious PDF — malware analysis report

Static analysis result for SHA-256 398305d6a5e32dbc…

MALICIOUS

PDF

47.2 KB Created: 2020-11-03 07:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1c9c97a03bef1374e117174fb2261565 SHA-1: d49b13126c538807d7c5484c1133d2cfafbff4a4 SHA-256: 398305d6a5e32dbccf547aaa9805df1030a102660ffe9a448e047c12b3521657
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure and a link farm. The ML classifier also strongly flagged this PDF as malicious. The primary malicious link identified is 'https://gettraff.ru/123?keyword=varathane+renewal+floor+refinishing+kit', which is likely used to redirect users to a phishing or malware download site. The document body, though heavily obfuscated, contains references to this URL.

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/123?keyword=varathane+renewal+floor+refinishing+kit In PDF document text
    • https://zidabowejixu.weebly.com/uploads/1/3/1/1/131163559/voxakel.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/7950623.pdfIn PDF document text
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/wenusunudal_wudugimomunew_tinanejabag_pudevezagebuju.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/e3fa4a4577039.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/makawezikotimi.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/1/0478/8656/5542/files/iron_man_2_full_movie_download_mp4_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3991/4646/files/wulepuxukiv.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/berix.pdfIn PDF document text
    • https://s3.amazonaws.com/nujosuwemedadi/fitness_gear_300_lb._olympic_weight_set_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/art_of_taking_action.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3341/7669/files/the_age_of_cryptocurrency_book.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B77 5148 bytes
SHA-256: 87ee53a62d661dc400ae32ecfce5fe7163f24829ade31f68607a60ffb2c707e3
font_01_sfnt_off00008d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D11 10332 bytes
SHA-256: 1109d131c10a30f94afe386ad0d9a7356c1ab778dfb175bd58668d1bbb270602

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