Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1c6cf6b0171015…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 09:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2717050004fc8ae72724107f66db95e6 SHA-1: d40ee68b3677f4f297e18c7cd7a66843c79397ca SHA-256: ce1c6cf6b0171015fcb2e38c0ebb4b9456f1dd00a665b8d19a30cdfefdb7ac9d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which point to suspicious or unknown domains, and one specifically to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'business case study analysis' and the malicious URL, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier strongly indicated maliciousness.

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://ttraff.ru/pify?keyword=business+case+study+analysis+example+pdf
    • http://files.datumautomation.com/uploads/1/3/0/7/130739032/nudaditedojo-ravefiwe-gosepatipus.pdf
    • http://files.sexualityintheolderadult.net/uploads/1/3/2/6/132682171/7326389.pdf
    • http://xupadis.othpreparedmeals.com/uploads/1/3/1/4/131454012/zipikizuxug-tulofabeg-diwedewexodiv.pdf
    • http://files.teignfilmmakersclub.org/uploads/1/3/0/7/130738503/netidonuxodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/11502733781.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/pupev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/89785647485.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/farapef.pdf
    • https://cdn.shopify.com/s/files/1/0431/9284/4448/files/6162965072.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/wondershare_video_converter_ultimate_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/mugisiwosadijijuzul.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/gegidom.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2066/files/todakavem.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/18798130429.pdf
    • https://cdn.shopify.com/s/files/1/0428/9380/3679/files/97454042086.pdf
    • https://cdn.shopify.com/s/files/1/0434/2431/7607/files/rubujixefagorolilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/engineering_materials_michael_ashby.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006363.bin
962e4170cb7b121c93cc2c35bc164aa56ba9e88b394f832363d419d82e27bdc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6363 5424 bytes
font_01_sfnt_off000075db.bin
dbb6041a3cc0873e4ffea09bf443fc8cbcec8add6af1292f74a23b0980581221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DB 9564 bytes

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