Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4de13d119274b65…

MALICIOUS

PDF

43.5 KB Created: 2020-08-19 23:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab4005c3723be4e2ec437a30628ce4bf SHA-1: 185a0f4d7dfd0e4a01504e510735f6f0121fafc2 SHA-256: d4de13d119274b65f510e1b3788b2b0ff415f939c6782ef3b7b1c336690299e9
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a PDF link farm used for SEO manipulation. One of these links, however, redirects to a known malicious domain (ttraff.cc). The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not intended for human consumption but rather as a vehicle for the links. The primary intent appears to be SEO manipulation, with a secondary malicious redirection.

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=berberine+and+metformin+taken+together
    • http://xumonosog.alterationstotnes.com/uploads/1/3/1/4/131438437/05a63c03.pdf
    • http://jadeba.ragmatical.com/uploads/1/3/0/8/130813747/puwofonor_toxagelasokot_bikofes_rugizinovafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9097/files/dugimojazuzute.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/18615154888.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/45205017654.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2557/files/gexikeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/technology_in_action_11th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/bodmas_decimals_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/86304203404.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/universal_serial_bus_controllers_driver_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0461/0765/6355/files/nuduw.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_off00006cf2.bin
7ec63fa6f94557aa1f76dd1f682d0edcb49bf605473dce17dfa0e56e2eb8c2a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF2 5364 bytes
font_01_sfnt_off00007f06.bin
0f60ad476ee14136e5b4ba618e10e6b7bdb23788985a5b619401663e0cd5bcac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F06 10084 bytes

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