Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8309fde0cb03d28…

MALICIOUS

PDF

39.0 KB Created: 2020-08-25 13:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8029e9cf7d40071a7a51f5ed110c6946 SHA-1: 5102bfbb5c6227dd4eca6d9319934938a54121d3 SHA-256: e8309fde0cb03d283b7feff17458011ea7544fae4665795118373725cd78bfc1
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common technique for distributing malware or leading users to phishing sites. The document body text, while partially garbled, includes a phrase related to kindergarten worksheets, likely a lure. The PDF also contains a mass external link farm, with many links pointing to Shopify domains, but one specific link to 'ttraff.cc' is flagged as a malicious redirector.

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=kambal+katinig+worksheets+for+kindergarten
    • http://files.theothermaine.net/uploads/1/3/1/1/131163615/4114487.pdf
    • http://files.hightechtintplus.com/uploads/1/3/2/3/132302973/47aff28564.pdf
    • http://files.gabriellapomata.com/uploads/1/3/0/8/130813511/054d4.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5522/files/probability_distribution_examples_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/18689670500.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/lathi_analog_and_digital_communication.pdf
    • https://cdn.shopify.com/s/files/1/0445/2777/9999/files/install_phantomjs_linux.pdf
    • https://cdn.shopify.com/s/files/1/0436/2423/5170/files/16794567320.pdf
    • https://cdn.shopify.com/s/files/1/0438/1114/3842/files/assembly_language_programming_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/87184139352.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/impulse_physics_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/discord_emojis_list.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a7a.bin
6750e690ceeb66ab072cac05fce55cb128162e07ccce8cfd4900ad6a5fb01189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A7A 5376 bytes
font_01_sfnt_off00005ca0.bin
af24d4b8f61742bc2ce24a296fd2804d040a3f7fd2effc1b5bf53606f6ad0f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 10128 bytes
font_02_sfnt_off00007f65.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F65 4324 bytes

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