Malicious PDF — malware analysis report

Static analysis result for SHA-256 578cbcdf7df9f896…

MALICIOUS

PDF

41.5 KB Created: 2020-08-10 13:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c18fb551ac26ccaf58f547f98edf61ef SHA-1: e9d2829e3a99a79b4c592db3c7a632e4621ec862 SHA-256: 578cbcdf7df9f896db3e4902f444ab5f7a10bfc7f51cf9a8d593bf0c843ba145
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=difference+between+agitation+and+mixing+pdf, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed 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=difference+between+agitation+and+mixing+pdf
    • http://files.muscatdogadoption.com/uploads/1/3/1/3/131379296/jodexenisuges.pdf
    • http://files.kateraganphotography.com/uploads/1/3/0/7/130775806/187928.pdf
    • http://files.roxandglitter.com/uploads/1/3/1/3/131398517/2107861.pdf
    • http://kutegupa.the-crazycucumber.com/uploads/1/3/0/7/130776257/5427081.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/8086_assembly_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/kisubovitu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2624/9885/files/capstone_project_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/apocryphal_acts_of_the_apostles.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/rurobabama.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/1484629412.pdf
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/tisujokitogogiwekaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4402/8068/files/58077294922.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5497/files/wixezukafopixikiwoxofekok.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/famibizokozakivis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/mathematics_of_finance_brown.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_off00006447.bin
f8cb96d64c60a995c4e2c10620211bb9b8411538eafa9ceec6662c5db3b5d02d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 5564 bytes
font_01_sfnt_off00007731.bin
537fef67befb41162ae2a41fb51b92ca735e3a032c3dd262d5d700d018e98abd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7731 9956 bytes

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