Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d63440b78dcdca…

MALICIOUS

PDF

63.1 KB Created: 2020-12-11 13:56:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ddc2cee87464260a5254350f978ca0d6 SHA-1: db3030a099ac55cbebcb0547c5cbec550b9a6fad SHA-256: e4d63440b78dcdcad6670518a5ffaf606f259f4ab2fb2b5cedeefeb37a509591
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for redirecting to known malicious infrastructure. The embedded URL `https://gettraff.ru/strik?utm_term=a+dangerous+son+ethan+update` is a primary indicator of this malicious intent. Although no scripts were explicitly extracted, the PDF structure and the nature of the malicious link suggest it's designed to lure users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=a+dangerous+son+ethan+update In PDF document text
    • https://zabamaki.weebly.com/uploads/1/3/4/8/134849969/woxuvurugevarixijo.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/f8ad7d.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/wasururiwe.pdfIn PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/aa10270bbb03.pdfIn PDF document text
    • https://nunezujotegu.weebly.com/uploads/1/3/4/3/134312528/wanuvasibopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_5fc0b9758579f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eec6724-56ad-4302-bb46-ef07f6fb8d89/winusb_maker_zotac.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/52598729063.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/html_stylesheet_font_bold.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf33fe48d292cf0c8aadb/t/5fd1e504133bcb3b88a0ab85/1607591173751/2089726877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bf1ff38-0c15-4652-b60f-58cb4fc3ec8e/20593458613.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/82903372731.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_off0000bbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF8 5176 bytes
SHA-256: 51b320618b94614c04b85543fcd4cd7dd36d697f85d2cd9a82a6dbf531593da1
font_01_sfnt_off0000cd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8E 9892 bytes
SHA-256: f0205ba3a68d1be8d5d552f035affb7868ad4149ceca922f4df7d37a300061ab

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