Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a95841d962b5098…

MALICIOUS

PDF

43.9 KB Created: 2020-09-14 02:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8615ed99e5db22d2a6622a3c2071ea1d SHA-1: db37d2301164bef04c68a498da02592ff2ce706f SHA-256: 2a95841d962b50985ba43f71a3f277ef8be2eddbb2da7924a2d1c5176c6ab211
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, identified as a link farm. One of the primary links, 'https://ttraff.club/wix?keyword=kinematic+equations+worksheet+with+answers', is flagged as malicious, indicating a redirection to harmful infrastructure. The document body, though heavily obfuscated, contains this same URL, suggesting it is the intended lure. The presence of numerous other PDF links further supports the link farm classification.

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.club/wix?keyword=kinematic+equations+worksheet+with+answers
    • http://files.henfieldcp.net/uploads/1/3/1/4/131482941/5fbd8.pdf
    • http://files.csscw2019.com/uploads/1/3/0/7/130740013/judurevivu-jijenanesipise.pdf
    • http://tukuv.derekdelacroix.com/uploads/1/3/1/4/131454065/fopugivutonudus.pdf
    • http://dirubur.timothyalexandrewallace.com/uploads/1/3/1/4/131437379/6692994.pdf
    • https://static.usrfiles.com/ugd/97634b_edba17a7796346c7a9f844550b520ed3.pdf
    • https://static.usrfiles.com/ugd/b8c837_38cd90dd58504d1fadfffde7be757e50.pdf
    • https://static.usrfiles.com/ugd/121e37_7638e9c887ad49ab887d1a986a0f1988.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4384/files/escherichia_coli_in_urine_culture_report.pdf
    • https://cdn.shopify.com/s/files/1/0462/6618/7933/files/oxford_bookworms_library_level_1.pdf
    • https://cdn.shopify.com/s/files/1/0462/0120/8985/files/94704344748.pdf
    • https://static.usrfiles.com/ugd/de65f7_b9591963ab5d4858b256313a62289fee.pdf
    • https://static.usrfiles.com/ugd/7c3584_948ec38528da4771905c7422c2fcc52a.pdf
    • https://static.usrfiles.com/ugd/8f6098_c2bf0c652f62410fad82a2c18451d9f6.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_off00006193.bin
846194c827f9bf6b8352452e24abb5f652f861ee570f43c110cda893f41ee916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6193 5256 bytes
font_01_sfnt_off00007358.bin
bfd67e66f20b9403b896483305ee0f15ee433efac309417b6e5f2f0cf6dde41e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7358 15456 bytes

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