Malicious PDF — malware analysis report

Static analysis result for SHA-256 2842372318cb42d3…

MALICIOUS

PDF

44.9 KB Created: 2020-09-08 20:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a587446addd9d7deb31293aaa4b787 SHA-1: f33c509b4c1947c3a1052ec393970d221f197552 SHA-256: 2842372318cb42d393d493353cb92795674e05361a3c5a0f11f358284f71cb1d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a 'consultant contract agreement template'. This link, https://ttraff.link/wix?keyword=consultant+contract+agreement+template, is designed to lead users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents, likely for SEO poisoning or to obscure the malicious destination. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=consultant+contract+agreement+template
    • https://static.usrfiles.com/ugd/2ca22b_0d11707363bd45dfadf8ea2026e46d49.pdf
    • https://static.usrfiles.com/ugd/f55bec_fc0d5e44c83a4ba485de9bfe7752b537.pdf
    • https://static.usrfiles.com/ugd/49f5ef_ffe5296d9ba443a5b630d40609ffcee4.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/nenuxagob.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/80121867674.pdf
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/24292247094.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/how_to_create_a_book_using_files.pdf
    • https://cdn.shopify.com/s/files/1/0439/5512/6430/files/cambridge_academic_english_c2_advanced_student_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/cry_beloved_country_summary.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/7871570092.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/peso_molecular_de_hno3.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/52774959264.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_off0000660d.bin
1619790d7351cec31f5a678da9603d81ccb2d1ac83261e7a0bbf96dfa049d04a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660D 5112 bytes
font_01_sfnt_off00007753.bin
9628efe0f525abc20f4f3ef0f9ae5561f3fd14ead234aa0efa2bd8bd242a4079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7753 9768 bytes
font_02_sfnt_off000098bd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98BD 4324 bytes

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