Malicious PDF — malware analysis report

Static analysis result for SHA-256 31bc1db3a4bbf7ab…

MALICIOUS

PDF

73.0 KB Created: 2020-08-31 08:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a2b89f168671722f5faa3d077bfc772 SHA-1: a27b6fd8afb47459b2ba7d868be469fbaa758ce0 SHA-256: 31bc1db3a4bbf7ab3353e853f450798d1763aa522c23563b4e8b66520b990125
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF SEO link farm. The primary URL, https://ttraff.com/wix?keyword=problem+solving+through+recreational+mathematics, is flagged as a known malicious redirector. This suggests the document's purpose is to lure users to malicious infrastructure through a deceptive link farm, potentially for phishing or malware distribution.

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.com/wix?keyword=problem+solving+through+recreational+mathematics
    • https://cdn.shopify.com/s/files/1/0429/2011/6380/files/29841197464.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/92210512865.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/leguxubebo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/12586701662.pdf
    • https://static.usrfiles.com/ugd/34e21e_23b17bfe1f354ce888ed8559edc5a81b.pdf
    • https://static.usrfiles.com/ugd/b8c837_65e21b207f954b5aa20bf575f0bf44ab.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/imacro_add_extract_col1.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/99302621045.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce9fe9742dad456c8961b1dc3fe4173d.pdf
    • https://static.usrfiles.com/ugd/b8c837_727369acb38440cc9e82b2393f2d1ed3.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_off0000cc3c.bin
7c4d958edf68b693b16049cd7f0e68ea4a7c12a779d9c68b9c04c55b0e3441c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3C 5416 bytes
font_01_sfnt_off0000de7e.bin
d5c73c05030573e38aa0e40779e493f8d13b147e864b75b8762dea549609ded0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7E 10340 bytes
font_02_sfnt_off00010217.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10217 16092 bytes

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