Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db984b326a7c9eb…

MALICIOUS

PDF

99.6 KB Created: 2020-08-03 17:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a475af61c6a5e60fed77ed58c41cdfa SHA-1: 9efaea2fb1a82afb2dc13c5f4500880e0bcc34ca SHA-256: 1db984b326a7c9eb41f81dbafe831d9f5bc4ea719a4f795bfd6bcee1a8a58715
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=types+of+pesticides+pdf`. Additionally, it exhibits characteristics of a PDF link farm, embedding a large number of external links, many hosted on `cdn.shopify.com`. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, suggesting the primary purpose is to drive traffic to malicious sites.

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.ru/pify?keyword=types+of+pesticides+pdf
    • http://files.sweettweetsby2.com/uploads/1/3/1/4/131438443/kakijupekezoxem_nuzubinorejup.pdf
    • http://files.thebrewnextdoor.com/uploads/1/3/1/8/131856108/wibesenov_ruduzizuvupo_wotubirujirixu_mexozajuzuw.pdf
    • http://files.communityfencing.org.uk/uploads/1/3/1/8/131872273/2720417.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/74264294114.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/dukanetomudotuson.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/1969_camaro_assembly_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/71713693552.pdf
    • https://cdn.shopify.com/s/files/1/0437/6389/2376/files/jijulotakodotawopelitod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/zubidorepode.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/kolug.pdf
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/gesidipabidupufu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/8043756533.pdf
    • https://cdn.shopify.com/s/files/1/0431/4572/4055/files/popogid.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_off000147f0.bin
21aea9caa5721e140c23f35300f3d7ad6ee9cf1cb7af51c966a26a6e252ab69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147F0 4864 bytes
font_01_sfnt_off000158a4.bin
f391a1afc4c5be675635891f69637ee4e200d47d71f9d8dd3604b0f880f8a915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158A4 11920 bytes

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