Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb1159afe12d668…

MALICIOUS

PDF

47.9 KB Created: 2020-11-07 02:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fccef9fd8fe9b293c6de4c572c0a54b0 SHA-1: c4be4351887126b5481116ef772324f1e410af0a SHA-256: 0fb1159afe12d668bebecab0f552b0a60705cb8acd6287e19b25809147f843d4
184 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external PDF files hosted on various platforms. One of the primary links, 'https://traffine.ru/123?keyword=funny+quotes+about+physical+therapy', is known to lead to malicious redirector infrastructure. The document's structure and the presence of multiple links suggest an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffine.ru/123?keyword=funny+quotes+about+physical+therapy In PDF document text
    • https://pidivupam.weebly.com/uploads/1/3/4/3/134327465/3766187.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/sifuwatodomenad.pdfIn PDF document text
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/soditepedavige.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/665612.pdfIn PDF document text
    • https://tanutefezuje.weebly.com/uploads/1/3/4/4/134437554/6900006.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/57a968ce-0100-4b8b-9d9b-c85497d52fb6/relikeg.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/wokumik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9ef7d4-f8ab-4b52-a554-10f6ed093b4f/jozuku.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://kinoxef.files.wordpress.com/2020/11/uma_cancion_para_novalie_google.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bba6fc4-a700-491a-90f5-eb79959084fe/ppsspp_gold_download_apk_2020.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_off00007bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD2 5344 bytes
SHA-256: 737950a03dcd7576cd8ccb7a0994f066ee6c8e62c9601337c65f1275ae737e72
font_01_sfnt_off00008e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E04 10832 bytes
SHA-256: b5ddc0df88bb6074728f9e4f17fee17296f555fb361e489da714268142fd04eb

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