Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f93bbf96fcaf5c…

MALICIOUS

PDF

34.0 KB Created: 2020-11-04 21:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3c9076e0421098005287d3f8f33b05ea SHA-1: 82880c5cc31fda18e7469a491aeff34e2ce9e3b8 SHA-256: 58f93bbf96fcaf5cfaa4149e5383eaa214f152f9317a2e04f622df3e0c2ab224
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is likely used to distribute further malware or phishing content. The document body and embedded URLs suggest a lure related to a video game, intended to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links further supports a malicious intent, likely for SEO manipulation or distributing malicious content.

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 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.
  • 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=another+super+mario+3d+ds In PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/2092662795d09.pdfIn PDF document text
    • https://lilikisewusufod.weebly.com/uploads/1/3/2/6/132682662/8649142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/pubowumuvuxasujiruzufoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/87534851567.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/wevozoduxewunonobisezolaw.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/bsc_nursing_syllabus_2018_inc.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/48833139179.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/procesos_psicologicos_basicos_definicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82217051-4f79-44b6-a8ea-6bb51c3bf8fc/bee_movie_script_single_line.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/petovutepug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470d798f-2354-46d2-81d0-2b0cad7b76d8/70746713663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3395dd-c9cf-497f-98aa-2e11675cb37e/fuji_camera_s2950_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/67407372984.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_off0000471f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x471F 5320 bytes
SHA-256: 1d0161a599f08f6e0722b585554aec5438cbffca719527c342908e377b83191b
font_01_sfnt_off00005909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5909 10044 bytes
SHA-256: e0e7302fda06f23a736e6fd4645e4327a19b702ca02cef5795ffa3563b6a8a48

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