Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c6d0fbbc2e94e2…

MALICIOUS

PDF

58.9 KB Created: 2020-10-29 16:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e7263ea95a2941ecf76b02be21e18bb6 SHA-1: 2c881394f839316706cc0d806e94f8e57e019eb1 SHA-256: 32c6d0fbbc2e94e217b46804a0d695c09393c429c4708bced49acbaceae29eb6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link farm with 24 external PDF links. One of these links, https://gettraff.ru/strik?keyword=mn+rules+of+criminal+procedure+27.03, is identified as a known malicious redirector. The document body also contains this URL, suggesting it is the primary lure. The presence of multiple PDF links and a malicious redirector indicates an attempt to lead users to a harmful destination, likely for phishing or malware delivery.

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://gettraff.ru/strik?keyword=mn+rules+of+criminal+procedure+27.03 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5f8e3d34747fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_5f99ebdaa34cf.pdfIn PDF document text
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/2338184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5f8d0c7d23fe3.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/ce94c668-eb91-4b75-9f12-ab56e14f9b1f/10847301176.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/lunitolewinulolidufor.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/nokuxeladizajewose.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/fidomewonelavi.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/android_apps_tutorial_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/33167143786.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/laxebuwunut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df12fd4-dae8-48f3-b682-1a38d4753bf6/46737502418.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_off0000a5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F2 5856 bytes
SHA-256: eadb69b3f95a012d19df2b33c10316220de9bb849c42248e4a84fb1bd78d93e7
font_01_sfnt_off0000b9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DF 10724 bytes
SHA-256: c54e2d1da2d518e0166a7d68ccb01cef3257f902c0ef1f0809fd08e5ea5de32e

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