Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16466b8fd9bc4a9…

MALICIOUS

PDF

45.9 KB Created: 2020-09-02 01:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f1d3665e80891459dc358c393061c2 SHA-1: dae14dc88918aa01e20d352795ccc3747a384032 SHA-256: b16466b8fd9bc4a9ad1ad96088634b2b8fa52b684ce16425b18eaed2901c9a0a
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. The embedded URL, https://ttraff.ru/wix?keyword=sap+abap+eclipse+editor, is the primary indicator of malicious activity. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site disguised as search results.

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.ru/wix?keyword=sap+abap+eclipse+editor
    • https://static.usrfiles.com/ugd/b8c837_b01fc56c381f4779bf5c7aad3101d6d4.pdf
    • https://static.usrfiles.com/ugd/02af14_62f33405e15e432c93add9efd747d53c.pdf
    • https://static.usrfiles.com/ugd/df73ab_7c1760a703704d1daaf005548090217e.pdf
    • https://static.usrfiles.com/ugd/ab0441_2b4c8b76cb9c4edaa5327de25c59cfc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6477cf545f694567a7980cc4a6bc81e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bb1a4cef80c490d9b7138e7d24b7a8e.pdf
    • https://static.usrfiles.com/ugd/fe0276_043db3c63e9b4257aa1d6bc9ebdb2d46.pdf
    • https://static.usrfiles.com/ugd/338562_aa49242fe90340638797340bbe02486d.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/mafulanekuvilevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://static.usrfiles.com/ugd/7f46b5_fe2c299276004863b64e120acc4acbcd.pdf
    • https://static.usrfiles.com/ugd/97634b_24b976b27ac74f1088e89fde153613ec.pdf
    • https://static.usrfiles.com/ugd/09273f_6dd76e5ae4544a25b5c592afc7410dfa.pdf
    • https://static.usrfiles.com/ugd/cec570_560f4c4595d14b86bca638a209ac997a.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_off00007488.bin
db4c45089ceecb5b0435c271818da794654f1cd69df6b805901bb5ca1f16fced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7488 5312 bytes
font_01_sfnt_off00008698.bin
5a01978940787bb2d9df2e78d137f67d42477ddae600f15c1af5b04f349e1074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8698 10956 bytes

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