Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed4e9d96a88da6e…

MALICIOUS

PDF

63.2 KB Created: 2020-10-05 11:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2ed986f2a72548bf9b6d93a9cb9b838d SHA-1: effc025fdc1dedbb6976c392ae57a0ea3249eef8 SHA-256: 9ed4e9d96a88da6e03aaf99e5aed33f1096b430a3c3d397c12419d3cc7370bd5
124 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The embedded URL 'https://ggtraff.ru/strik?keyword=to+autumn+john+keats+pdf' is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, reinforcing the redirection attempt. The ML classifier also strongly flagged this PDF as malicious.

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 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/strik?keyword=to+autumn+john+keats+pdf In PDF document text
    • https://site-1039903.mozfiles.com/files/1039903/42149775935.pdfIn PDF document text
    • https://site-1037856.mozfiles.com/files/1037856/7925293469.pdfIn PDF document text
    • https://site-1039828.mozfiles.com/files/1039828/60050504041.pdfIn PDF document text
    • http://tijul.freespiritsewingstudio.com/uploads/1/3/1/8/131857650/1172758.pdfIn PDF document text
    • http://xinesamu.suelidesigns.com/uploads/1/3/0/7/130776031/8dbc3af0c.pdfIn PDF document text
    • http://wunipibu.hossfirearmtraining.com/uploads/1/3/1/3/131380183/9879513.pdfIn PDF document text
    • http://keats-poems.com/pdf-files/In 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/b49a34c4-1304-4d4a-922a-cc8729c42434/fexuvelavininenibazonoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b183103-5243-42d0-98d8-de3d90694304/30181192294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26381089-35fc-4658-b641-e7c891560345/diliruwolifoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18b3c7b7-b621-43d8-aad2-23c6bbfdc889/92999680596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60c773c-dd13-479e-bbae-6159dc5ca3e4/misevanedusuwalevizavaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/michigan_condominium_act_section_57.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/21959252537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7717/8022/files/nelapirigixopejogazud.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_off0000bac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC7 5240 bytes
SHA-256: 9b0dbc3bbb9b7fc5aba93a57abc2d39fb43df9b8c985d1fa4d783467ce9c4669
font_01_sfnt_off0000cc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7D 10304 bytes
SHA-256: f4316063444ddc1de17d8d8b8f20bed4922b063130d5e820ac0383369ff6e054

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