Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7de51aee7f84160…

MALICIOUS

PDF

42.8 KB Created: 2020-09-01 02:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a6fcd15d73e0957f845161f8244f4ed SHA-1: 1c8c7c324d367f7e436481d12d2d1eb14615b029 SHA-256: a7de51aee7f841601f71ff3dbe811e4c25c7f0a81771605288ce4d8604359f3a
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for delivering malicious content. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The presence of numerous external PDF links further indicates a link farm strategy, likely to improve search engine ranking and distribute malicious content.

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=horrible+histories+frightful+first+world+war+pdf
    • https://static.usrfiles.com/ugd/b8c837_8b9369de28884babb502e35e5b2e1cb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2eb17ebcb54d4dd4b98a7b1c9242065a.pdf
    • https://static.usrfiles.com/ugd/7f46b5_fcf9e44700094f7ca6f2aa58bf0a5230.pdf
    • https://static.usrfiles.com/ugd/f84671_bfe22f3870714a8caffdc08ccdd98c1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce61c0dd2b3d49a495ef7d193c71a72a.pdf
    • https://static.usrfiles.com/ugd/b8c837_11e581ef13624aa7a70b29450cc945d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7ca450560b54881aa546c7506a69fa7.pdf
    • https://static.usrfiles.com/ugd/07e02c_e9ea5b9bb99b4ffa8410c358774fa360.pdf
    • https://static.usrfiles.com/ugd/ac72e0_1487c4a5e5644fe5a721cabedc144544.pdf
    • https://static.usrfiles.com/ugd/b8c837_a30388abdfd24672a16a5c465e37949b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f07abd4e94e4775beff56f609c3000f.pdf
    • https://static.usrfiles.com/ugd/90c678_d705952907a345199e29875c47a05e2a.pdf
    • https://static.usrfiles.com/ugd/9f6a24_798f26482ec64c43ad230de76003370e.pdf
    • https://static.usrfiles.com/ugd/96768c_46afde423c9b44e78a912ee908d7a798.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/36421196234.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/baelo_claudia.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/19036031065.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_off00005fcc.bin
cdc9a30044c07c436782404d182e626bfd6e5e947cf549d05bf3d4067d1f7394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCC 5496 bytes
font_01_sfnt_off0000727f.bin
1596147ee283a4fbabc7f7f5d76b6782194a39451f139ba9e1eb1b6356dc2014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727F 13800 bytes

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