Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01891fc45b6ddce…

MALICIOUS

PDF

46.9 KB Created: 2020-08-10 05:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b06f895768fcfd966a68e410ef93d893 SHA-1: 3d54478a7ed3f9702ad56ebf21275c36a7552a67 SHA-256: f01891fc45b6ddcefe090770710ab7c698d7a64438f08216c21d9a9037eab6b2
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document about watercolor pencil techniques. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm, likely for SEO poisoning or to distribute malicious content. The ML classifier also strongly indicates maliciousness.

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.
  • 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.com/pify?keyword=watercolor+pencils+techniques+pdf
    • http://files.kristareimer.ca/uploads/1/3/1/3/131382274/maruna_disunonojog.pdf
    • http://tisobu.saraelizabethtaylor.com/uploads/1/3/1/4/131409090/gikis.pdf
    • http://files.demirandaguitar.com/uploads/1/3/1/8/131871690/fokodibavuf_zogovisum.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0432/6224/7067/files/watch_secret_diaries_of_a_call_girl.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/61339882792.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/adding_and_subtracting_decimals_game.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/fakoromobasi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/config_inc_php.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/aprender_frances_completo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/network_security_papers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/14399832945.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/jixadafat.pdf
    • https://cdn.shopify.com/s/files/1/0440/5071/0693/files/rerixebulutukasiwewowuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/m16_lower_receiver_blueprint.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/90252105458.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_off000079fe.bin
fd38e1672815fcaaa6d6845f4133ff3c6bd674b3309b671fe8a31b273b027c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FE 5384 bytes
font_01_sfnt_off00008c4b.bin
645b73261e5c1dc9577d4e5091f72b2cb505eff3b93bacde1302a85f432a2d26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4B 9956 bytes

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