Malicious PDF — malware analysis report

Static analysis result for SHA-256 a283e136131481d9…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 06:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43e8fcd14537e2a674cdcd2d18187a94 SHA-1: c077aef13ed30358a6a34744af5bb304a9cbd58b SHA-256: a283e136131481d96d08cc85c05edc6602a3ce81e6c04c9ffd613658cc5f3c2c
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=1794-ia16+wiring+diagram'. This URL is embedded within the document body, disguised as a wiring diagram, indicating a social engineering lure. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on 'static.usrfiles.com'. No scripts were extracted from this sample.

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/wix?keyword=1794-ia16+wiring+diagram
    • https://static.usrfiles.com/ugd/4f270c_0ab6df413ad54ad08d7e702941da4b78.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_9d1141367a364866b38df7064c5c5a47.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5e20af8452c416ebbd5ff8dbaa83864.pdf
    • https://static.usrfiles.com/ugd/9cc572_bf3cecd54c054d3698924fafac09a8e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1da6a373220e4bd8a96f493599bd8d68.pdf
    • https://static.usrfiles.com/ugd/b8c837_71ee7a45dfad423e9b5932f2d52fef28.pdf
    • https://static.usrfiles.com/ugd/b8c837_a99853fd863d43dbb0d664d8015ed262.pdf
    • https://static.usrfiles.com/ugd/b8c837_467f2dc5953d4a34aabb7284f47b995b.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/ansys_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/petetoram.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2173/files/68379691096.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_off000066b6.bin
3348c9a473f47d2c5cc46f4ba95b665be63d20d55c2893b0f92f3c56232af090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B6 5492 bytes
font_01_sfnt_off00007964.bin
d8b0e1bd3afac9a64e271e2c4f3081f871c0febd94329e4fa5360a3f858cd6b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7964 10548 bytes

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