Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9060bc84b53800c…

MALICIOUS

PDF

47.7 KB Created: 2020-08-23 09:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 732d7519b04bba9517c7566297e23ac7 SHA-1: 6fccc665800719eae24be4d1de4e05f51f6e34ee SHA-256: c9060bc84b53800c16c6f9af9c0523f17930a3979537583a2cd0c235fd77d78b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link disguised as an answer key, which redirects to a malicious URL. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this redirection to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a broader campaign to distribute malicious content. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=math+9+answer+key+module+2', is the primary indicator of the malicious redirection.

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=math+9+answer+key+module+2
    • http://files.southernsourceinspections.com/uploads/1/3/1/4/131452944/8e90df4e8f892.pdf
    • http://tikiv.stkjustlabskennel.com/uploads/1/3/2/7/132740285/7497131.pdf
    • http://taxaresu.misskatskinks.com/uploads/1/3/1/8/131856214/6775278.pdf
    • http://wunuz.drrichking.com/uploads/1/3/0/8/130814328/9e8751.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0738/files/51709571150.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/92354564292.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90675932679.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/kuxuxak.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/91180902481.pdf
    • https://cdn.shopify.com/s/files/1/0431/7803/3303/files/kagotusibeni.pdf
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/autohotkey_mute_mic.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/vobete.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/gotham_font_github.pdf
    • https://cdn.shopify.com/s/files/1/0434/1635/4977/files/82454947054.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/garebus.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_off00007142.bin
4dac52d96e4ce63afdb34dec29c51945527f3c30d105fb747ce2af78d8ae2104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7142 5616 bytes
font_01_sfnt_off00008441.bin
828010d04df1cf7ec55072c7eafdbb6fef29cb2604615bf3da83890a0ab37063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8441 14556 bytes

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