Malicious PDF — malware analysis report

Static analysis result for SHA-256 727a77cf3500c9a9…

MALICIOUS

PDF

40.6 KB Created: 2020-10-02 00:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 84587bd08c91d28680abc5924da44659 SHA-1: 156683743870f198f3813efaab9be1689d787686 SHA-256: 727a77cf3500c9a9064c780dd6e5e28f4d53416a0fe9b7a07fd7a36a6999694a
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a significant portion identified as a link farm. One URL, 'https://cctraff.ru/strik?keyword=carti+antreprenoriat+pdf', is flagged as a known malicious redirector. The presence of a large number of external links suggests an attempt to manipulate search results or redirect users to potentially harmful content, aligning with SEO poisoning or phishing tactics.

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://cctraff.ru/strik?keyword=carti+antreprenoriat+pdf In PDF document text
    • http://joriki.brucemakotoarnold.com/uploads/1/3/1/6/131606162/tulugalapibabala.pdfIn PDF document text
    • http://files.dreamchen.org/uploads/1/3/1/3/131384636/nubadobode.pdfIn PDF document text
    • http://files.netstreamz.com/uploads/1/3/1/4/131406688/787293d2203d838.pdfIn PDF document text
    • http://tarifabez.dennisnealvaughn.com/uploads/1/3/1/4/131454120/a6f9b3.pdfIn PDF document text
    • http://lovume.metalrescue.co.uk/uploads/1/3/2/6/132681670/zepikufug.pdfIn PDF document text
    • http://files.sarabaloughdesigns.com/uploads/1/3/1/4/131453206/dumoropudupav.pdfIn PDF document text
    • http://files.tristatemodelers.org/uploads/1/3/0/9/130969421/jinipezorofo-navamexim-kopakovit.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/1/0475/4623/7094/files/81915443182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6976/7321/files/12679074878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8440/7199/files/carnesale_commons_ucla_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7640/0792/files/15470294639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d57119f-73f4-4710-ac99-929396685de3/52413592053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddf9ecf9-786c-4569-b960-fd732fbd9a61/62999251207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6235d2-14f3-4f90-992b-92bb0fb7d304/maxenuwilokebudojen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d3aa66-fae0-420a-9139-1698136e774b/gofivamu.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_off000060f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 4732 bytes
SHA-256: 2515ba24118549191ab4ff0ee913e318945fd46ae051040120d28ecb30dc3bd4
font_01_sfnt_off00007116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7116 10776 bytes
SHA-256: c9d9a153071e6b219b7e2ed2f48df438b7e464a3539d10f38eb4fa5ce8c1e9ca

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