Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a917e1f95db98c…

MALICIOUS

PDF

52.7 KB Created: 2020-11-09 14:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a83985ca4a9ca1c53a52afafcb3812f SHA-1: 5c1ec8f14738f804400d815b33f5632a5b4a8d14 SHA-256: 80a917e1f95db98cfc876ae12db3aad8c87f1e7fcfbc151d174dcf462ead9043
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with one identified as a potential SEO link farm. The primary malicious URL, 'https://trafffe.ru/123?keyword=water+pennywort+propagation', suggests a lure to a site potentially involved in SEO manipulation or hosting further malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate an attempt to redirect the user to malicious resources, likely as part of a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?keyword=water+pennywort+propagation
    • https://defejeve.weebly.com/uploads/1/3/4/3/134386135/tolidu_subotirakakited.pdf
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/052c2f5.pdf
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f874fbd34294.pdf
    • https://cdn-cms.f-static.net/uploads/4405651/normal_5f981322a1a55.pdf
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f87bf840f95f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/091cab9e-31f5-400e-a3ef-7a574ca86851/14430640444.pdf
    • https://uploads.strikinglycdn.com/files/d233513d-8c59-458f-8d43-93eea4680207/43993256617.pdf
    • https://uploads.strikinglycdn.com/files/b7d76089-2c9f-4dc7-a7e3-9ace35273008/93062412945.pdf
    • https://s3.amazonaws.com/pisik/xiximumezi.pdf
    • https://uploads.strikinglycdn.com/files/4937f311-2122-4bcc-96c4-7336cbb76346/fixaxituvifalutiguroz.pdf
    • https://uploads.strikinglycdn.com/files/f8050e58-c3b5-4246-a5c8-91f18817963e/venowexelopetapiju.pdf
    • https://uploads.strikinglycdn.com/files/e70933f5-fb64-4fb6-bcdd-36b44ab7b55b/67511605793.pdf
    • https://uploads.strikinglycdn.com/files/54534bfe-fb86-4709-9a28-a1fc39c0438b/nigor.pdf
    • https://uploads.strikinglycdn.com/files/ecb27327-61f5-4776-8d59-3325ba695470/tiberius_t8_1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007267.bin
5030e0b80ef9c1578a687d502f39a290f7c8e3bbaf292693cffd1fed19baf40c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7267 4984 bytes
font_01_sfnt_off0000838f.bin
16095b988075a8db0cb69ca42654e098c1f679d664c9712b529cac898f233591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838F 10628 bytes
font_02_sfnt_off0000a7ea.bin
5f450e491d123d8c82828399798287d52f7fb05a66e23714e0201b6eb73006ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7EA 18804 bytes

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