Malicious PDF — malware analysis report

Static analysis result for SHA-256 482191c1f87921e8…

MALICIOUS

PDF

40.0 KB Created: 2020-08-09 04:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acf6129c72120d5e1f39c5e85af1b072 SHA-1: 6d528d9175a505acd5cca0085ada68c878fef22a SHA-256: 482191c1f87921e8024851fe59f9ad88e7e8a508a6475f21cfa45722ffa0d6fe
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, identified as a link farm, with the primary redirector URL being ttraff.cc. This infrastructure is designed to lure users into clicking through to potentially malicious content, disguised as PDF files hosted on Shopify. The ML classifier strongly supports the malicious nature of this document.

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=capelania+hospitalar+espirita+pdf
    • http://files.630shistory.com/uploads/1/3/0/7/130776401/zonikinukitevi.pdf
    • http://files.hungrylikewolves.com/uploads/1/3/0/8/130874678/mivatonidosagun.pdf
    • http://files.iconbiketours.com/uploads/1/3/1/4/131482886/6922958.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/95840486863.pdf
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/the_abbasid_revolution.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/xebagakosofi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/national_literacy_learning_progressions.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/65741837367.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/75405454684.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/89262496022.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/xenibejokakugevetewogenup.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/wurebodemedizeli.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/electrical_installation_risk_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/87538728247.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/vebig.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/bawiguwidokek.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_off00005ffc.bin
66b0ae2c6196284ec9d310b8d3097ed2888c170f96402416490da9134934f5f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFC 5032 bytes
font_01_sfnt_off0000710b.bin
f9b5fdc57d0eb30170f9395735599b533f19e560adcf7bfbd8e270e4c5ad7bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710B 10036 bytes

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