Malicious PDF — malware analysis report

Static analysis result for SHA-256 c486fb13b85305db…

MALICIOUS

PDF

54.2 KB Created: 2020-11-20 12:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e5889a5133ce7b8e5911af0bf46fc1a4 SHA-1: 4f153fe643a4019c11671c5c30bea35243e632af SHA-256: c486fb13b85305db46f5bbfc0377bc59875220ae78b8da0ef5e6db1209a1f49c
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'https://trafffe.ru/strik?utm_term=senior+class+president+graduation+sp', which is likely a malicious domain used to redirect users. The document body is heavily obfuscated and unreadable, but the presence of numerous external links suggests an attempt to manipulate search results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8528

Heuristics 3

  • 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
  • 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/strik?utm_term=senior+class+president+graduation+sp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452862/normal_5fa43832db1f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f8f5166a1ed4.pdfIn PDF document text
    • https://jutawalafomas.weebly.com/uploads/1/3/4/3/134316275/wokidavexotogilan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f9278a5e728e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5f95f9b12f84a.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/napotamoboviz_dimunekeluwo_bijesexasudowu_nosufel.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/37b6dc67-8a4e-4c7e-af5d-54fe2f730f48/51664231068.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/givogukevupatunozek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931d068b-374c-4237-8bdd-6a96449506d3/petivakupirabilopigan.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/st_john_s_cemetery_queens_ny_visiting_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d7a8df-e1cc-473f-af27-dcabf2db9a1d/cosmo_and_wanda_costumes.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/channa_mereya_movie_punjabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b93d727-22b6-4b51-a760-e4d68c83fa85/imp_of_the_mind.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAED 5344 bytes
SHA-256: 3ad2da6e47b40aed0e4df29b176f9925244cdd63f187671316fbdf425f69fbd9

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