Malicious PDF — malware analysis report

Static analysis result for SHA-256 4347d8d1a2ca791a…

MALICIOUS

PDF

64.6 KB Created: 2020-10-02 09:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 803431ecaa9e3ef8631d10c9e01c765d SHA-1: 9274884cca9460f07e3eeea6b23045eb343c63ff SHA-256: 4347d8d1a2ca791a96a0a0b9bb0f82df7d7286b085dc3f1ee15b5697137960f9
124 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with a primary link identified as a malicious redirector. The document body mimics a search result snippet, suggesting a phishing or malware distribution lure. The ML classifier strongly indicated maliciousness, and the presence of multiple links to disposable hosting further supports this assessment.

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://cctraff.ru/strik?keyword=guns+germs+and+steel+episode+1+answe In PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/55822864860.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/tukewuwesumetepijojob.pdfIn PDF document text
    • https://site-1040223.mozfiles.com/files/1040223/21707219530.pdfIn PDF document text
    • https://site-1038808.mozfiles.com/files/1038808/rogiz.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/60542578961.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/zitogomujetumivale.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/givevitovipidozu.pdfIn PDF document text
    • http://files.accianiengineering.com/uploads/1/3/1/4/131437457/tirodubave.pdfIn PDF document text
    • http://guwelo.columbiayouthsoccerclub.com/uploads/1/3/1/4/131453870/sixewevetimone-maxidige-tibuku-merul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6783/7078/files/lexizuwifuxazopabadigul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5980/0983/files/terner_watch_wr30m.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_off0000c073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC073 5456 bytes
SHA-256: ace46f7e412703a5d58a164709f30cd4a026675019b2fc399bd2b2b67ca00773
font_01_sfnt_off0000d301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD301 10076 bytes
SHA-256: 9d661e4dff5bba20933784a551cb0de056fc09b2168c75a61d2a528c0e6ec88a

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