Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e80bc01a871361…

MALICIOUS

PDF

48.1 KB Created: 2020-10-02 23:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 90a58518890ba2394b56e291f51db0b2 SHA-1: 5e26ea8504b87da79d305591c002834b4c942eb6 SHA-256: 13e80bc01a8713617da286ef8f0c7c1c3d11f6b14410cec5bd73171102a9dbe3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and contains numerous embedded links. Several of these links point to known malicious redirector infrastructure or are part of a link farm hosted on disposable domains, suggesting an attempt to lure users to malicious sites under the guise of academic content. The primary malicious URL identified is https://gettraff.ru/strik?keyword=computer+networking+kurose+7th+edition+pdf.

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://gettraff.ru/strik?keyword=computer+networking+kurose+7th+edition+pdf In PDF document text
    • https://site-1039319.mozfiles.com/files/1039319/zotebu.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/kinokedoronibu.pdfIn PDF document text
    • https://site-1041084.mozfiles.com/files/1041084/74667446509.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/10360370416.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/jaserimogekajudomeneluno.pdfIn PDF document text
    • http://files.sareetadomingo.com/uploads/1/3/0/9/130969373/xifovesolu-rofetaxo-zabotipusalugej-kakavosat.pdfIn PDF document text
    • http://sugexez.openthedoorleadership.com/uploads/1/3/1/4/131453558/dadixexoxovore_zezax_zigitetob.pdfIn PDF document text
    • http://files.mariposacelebrations-eventmanagement.com/uploads/1/3/0/7/130740143/gijosupid.pdfIn PDF document text
    • http://files.chbcf.com/uploads/1/3/1/0/131069839/pojuxoxopuz.pdfIn PDF document text
    • http://latataga.quebelloespanol.com/uploads/1/3/1/4/131483955/mikukexa.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/6f97ae82-5fb3-4b94-be96-9d0893afb1f1/bugibav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd9ec54-eaf6-4025-b9f8-e19c68a80112/rezisufasobuwifokaguwil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde8c483-2026-4a4f-9f93-10cbaf3868e3/83968055544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb04f139-1b37-4208-a0c7-03580f623e08/sizirasigejavipibinefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa49eb1-e579-404e-b68a-fd0d02307c7f/xidizerora.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_off00007f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F04 5356 bytes
SHA-256: ab5ecb66bc851da870e26c5a2e95769f281542dd7150fa5a1d272d23ba551fd8
font_01_sfnt_off0000912e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912E 10088 bytes
SHA-256: 1920ee15347422e9531d943a05fb206b03aa2db3ecc3087a377d34041668b66d

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