Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e094e989dc9f77…

MALICIOUS

PDF

50.9 KB Created: 2020-08-01 17:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9df12af1032567b44b10a9a5149f6e0f SHA-1: 10d8992c345b55c2a18f7953dd4b11f756173b1e SHA-256: d3e094e989dc9f7791bf39eb3bd399194c9febe217ad9e73ddb915fdb700f79d
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, https://ttraff.cc/pify?keyword=stardew+valley+the+spreading+weeds, redirects to known malicious infrastructure, indicating a potential phishing or malware distribution attempt. The majority of other links point to PDFs hosted on Shopify, likely to inflate search engine rankings or distribute further malicious content.

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.cc/pify?keyword=stardew+valley+the+spreading+weeds
    • http://files.singaporelawngames.co/uploads/1/3/2/7/132740327/tefifatas.pdf
    • http://files.cage-design.com/uploads/1/3/0/9/130969169/1176361.pdf
    • http://files.badgirls.hu/uploads/1/3/0/9/130969735/tojebodujomiwi.pdf
    • http://files.christkingdomsaginaw.org/uploads/1/3/0/8/130874180/kerolobufusonositex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dilos.pdf
    • https://cdn.shopify.com/s/files/1/0434/6216/4644/files/53228022270.pdf
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/wewomefewadivoziwitide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/kagalujurawojobi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4217/6150/files/29108208937.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/tilufapuvinogevukoforur.pdf
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/mame_chd_files.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/65800005587.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4726/files/74345451789.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/29956018436.pdf
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/34194897011.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_off000087c5.bin
059c069ae6dbf6ca46b68d29683291140d5e703166a9f41f893920ae19e7a3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C5 5576 bytes
font_01_sfnt_off00009ad2.bin
1d6d5c15b8c040e4523a649ddc114610a91c0e1e8dff24e9a97dd7d1cb9969d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD2 10580 bytes

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