Malicious PDF — malware analysis report

Static analysis result for SHA-256 b620148e289f47a4…

MALICIOUS

PDF

42.2 KB Created: 2020-11-06 21:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fe3d46cd0056a3d2041f10143fc4fe70 SHA-1: 0a7b0f392d98b64565f1096d123b558d4e7d91d8 SHA-256: b620148e289f47a4fd0e74dd5caec7ccd6a77f3269756e82f99efd5c2ab48dae
184 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL observed is https://ggtraff.ru/aws?keyword=manchester+nh+restaurants+campo. The document also embeds numerous links to other PDFs hosted on disposable domains, indicating a potential SEO poisoning or link farm attack. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, and the ML classifier strongly indicates malicious intent.

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://ggtraff.ru/aws?keyword=manchester+nh+restaurants+campo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_5fa45bb20dad4.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/bezejid-bidafimiriloj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f90b553df2ec.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/pixilepakeg-wokotuponukud.pdfIn PDF document text
    • https://bezuxinawe.weebly.com/uploads/1/3/4/6/134600255/tavefolobagobisomin.pdfIn PDF document text
    • https://xorusisu.weebly.com/uploads/1/3/4/3/134314808/672520.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://givovodexe.files.wordpress.com/2020/11/wavread_matlab_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/87134996730.pdfIn PDF document text
    • https://danusodemoza.files.wordpress.com/2020/11/sulifedawoz.pdfIn PDF document text
    • https://borivul.files.wordpress.com/2020/11/dilizimowuretakalobanif.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/21238546982.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/39214253074.pdfIn PDF document text
    • https://romekelisefo.files.wordpress.com/2020/11/nitunawikudaremutujozudok.pdfIn PDF document text
    • https://woxawekobati.files.wordpress.com/2020/11/38885298012.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_off00006506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 5144 bytes
SHA-256: 31351abd3d609549566a313cfbc1d6c539ead6d5e5b88a24d2b53ad1bac8d8d7
font_01_sfnt_off00007663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7663 11040 bytes
SHA-256: eae88575e2b8a6f2dbb5a88498c90566edbab5524e06e0f49db6a08f53c37d35

Open this report in the interactive analyzer, or submit your own file for analysis.