Malicious PDF — malware analysis report

Static analysis result for SHA-256 6148203a2eb1128a…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 11:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9326909b92f41ba34678f443c411572d SHA-1: 346e2969aa1e0ff08e8cd568dc7a1407c765627a SHA-256: 6148203a2eb1128a572e46a40eeedb293f1b37725c20cc4906a74e035bbb4e99
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.ru/wix?keyword=cirque+du+soleil+crystal+performers+names', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, indicating an attempt to drive traffic to malicious infrastructure under the guise of providing information.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/wix?keyword=cirque+du+soleil+crystal+performers+names
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3bf302_d392d1f3046f4db6bda9e669d9a9f833.pdf
    • https://static.usrfiles.com/ugd/8b9728_ed4a76873f5a4d3f8adcb1a41d624ce6.pdf
    • https://static.usrfiles.com/ugd/bd5c68_dad1ea0eafb343fe95a8aca184707cbd.pdf
    • https://static.usrfiles.com/ugd/217d68_78f0b56a0480449296dee5baeca05efe.pdf
    • https://static.usrfiles.com/ugd/ea2f88_da13fa50bba64050a3e3237e506269f8.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/jvc_kdr330_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6508/8936/files/30567797322.pdf
    • https://static.usrfiles.com/ugd/79e0dc_6bf2c8d7eed44b4bbc49755d6379aabf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1b9eaafee024ac588beca8e65b2ae98.pdf
    • https://static.usrfiles.com/ugd/739437_c8de7a73925f42c4b1bbb8423b946cd8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed65bc8767a9478181d30ce0d073edcc.pdf
    • https://static.usrfiles.com/ugd/bfbc46_f7436f4ca8654a12b4a22ce6a0339a03.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/silabizewunuxalufowevepo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/putirufuzaginalex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006072.bin
7fd46e2d0a9d59bbd7c4e945f893e14a14d86ffef2f4553fc0fc494aa5eda473		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6072 5436 bytes
font_01_sfnt_off000072d6.bin
92d7bc47d88c831dbddbe8b77ecf73a15c5323e8ed62c873936caabf9bac69ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D6 9920 bytes

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