Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0de8c4dd9d70a3…

MALICIOUS

PDF

42.0 KB Created: 2020-10-30 13:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e34d4a15f86e7625b53514bc713f9dc6 SHA-1: 3511dbe67881448aa21a8aab77fe892bd15576e8 SHA-256: 2d0de8c4dd9d70a34158c390146c961b16ef1d16b3e85b96fe1a06c3af8d58ef
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?keyword=feasibility+study+example+product+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of the malicious URL within the document body indicates an attempt to lure the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=feasibility+study+example+product+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f879fae5c8e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5f93b45faaac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f90668edf9b9.pdfIn PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/2a552c4750a9171.pdfIn PDF document text
    • https://taxufizewafodo.weebly.com/uploads/1/3/4/4/134477277/teruxobifinewukexe.pdfIn PDF document text
    • https://tanutefezuje.weebly.com/uploads/1/3/4/4/134437554/fabawulerav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f8bc739503c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5f9684884d977.pdfIn PDF document text
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/385d5c362faac4.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/87ef4027-ee67-4427-bd56-54e2a8a0c3cd/21264597007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/705e3f93-6595-472c-8238-5699c2a6745d/3851641471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74daaf57-2a4c-4fda-b1dd-bba39583c4e2/system_programming_by_john_j_donovan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5738/1027/files/gigozizutumorejaz.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_off00006572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6572 5568 bytes
SHA-256: 5857c0b2dbe8e8a3dde0f78be8933e67984934fbce49a2edd941719f1e635349
font_01_sfnt_off00007857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7857 10316 bytes
SHA-256: ad0391de85064609d00dfba323f1fbf06fc5ebebb75386fad202d1628952c26a

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