Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4c492231a99157…

MALICIOUS

PDF

45.1 KB Created: 2020-08-21 17:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5adc49cab9a6427be67d06aa26252402 SHA-1: 1fc8b2e174cb9f6c41a6e6b92e44c685cbd64589 SHA-256: af4c492231a99157cc190150d4e779c5e4fdf1958735a9238dba4000194823a3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous external PDFs, with one primary link identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Agriness sistemas e tecnologias de informa��o' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.
  • 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.
  • 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=agriness+sistemas+e+tecnologias+de+informa%25C3%25A7%25C3%25A3o
    • http://files.mattrobinsonphotography.com/uploads/1/3/1/6/131637056/xixure.pdf
    • http://files.uscitizenshipprepcourse.com/uploads/1/3/0/7/130739288/8269037.pdf
    • https://cdn.shopify.com/s/files/1/0440/8783/6837/files/renefezavipev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopafomapezujiwowab.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/sujudifafibegonezirovez.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/30496522415.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/25975490729.pdf
    • https://cdn.shopify.com/s/files/1/0434/8067/8557/files/project_budgeting_methods.pdf
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/21522315183.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/39135019572.pdf
    • https://cdn.shopify.com/s/files/1/0438/4958/0704/files/fologumetaronexuli.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2016/files/wonuzolelu.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_off00006115.bin
9bd3e8b3a8553e3bf5186406c1dd8c8395b19e09feb351f5a9d97bfa97b6c301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6115 5828 bytes
font_01_sfnt_off000073ea.bin
6845d12289d68c0a00dfa25599b98ea875a7dcffaaa3bb6332024a855ece6a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 17296 bytes

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