Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b1d028066aa1d7…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 00:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e4867021913ad239293915ebac1af16 SHA-1: b06918079b0c70fa0c68bad990da2e92b034638b SHA-256: 74b1d028066aa1d713d413005d5e2eee0bf00fa09291fa53a8a010e3df60ddd2
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=emerson+research+smartset+manual, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and appears to be a lure, possibly for phishing or malware delivery. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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.com/wix?keyword=emerson+research+smartset+manual
    • https://static.usrfiles.com/ugd/71fd01_0b9315d5f66340aa9d8509d75c362e8d.pdf
    • https://static.usrfiles.com/ugd/69695d_1765a0e315df40e3bf38fa60854dd8ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_05b497b961194b16afdc2a94d0ec40ae.pdf
    • https://static.usrfiles.com/ugd/6d59ab_2c7cec064667468bb20364b3d8a7d16e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c86cb1598eb6493585615c847688f11f.pdf
    • https://static.usrfiles.com/ugd/d55797_d34bb2f3e9704e9da4b86bcaa64543fd.pdf
    • https://static.usrfiles.com/ugd/0b46e6_df7b5491a40846b3bf6474866275ffe8.pdf
    • https://static.usrfiles.com/ugd/99965f_df4fb8cceac94102a5eef51bc0ffaba8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d10fabd072346dda4cf7dba52b25347.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_5317baee6b4a43d6b71255869966187e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e285629aa57b4869b8e57c127a89b030.pdf
    • https://static.usrfiles.com/ugd/c12414_84701b8544434b5592e9fa8705fe05ba.pdf
    • https://static.usrfiles.com/ugd/906e9f_3154adbd6de84c468480c6d4bdaccc6c.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_323fc81b4e854cd5a333f363c07af502.pdf
    • https://static.usrfiles.com/ugd/3b0c81_e19a05baa9f54ed8aafce11f2685df07.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed6b4b5cd7af4c21a6159f72421b3196.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_off00006790.bin
0a8389dbe08af7aa56546ffab633d4ae179f76dc513645fbcaa9dd696645d06e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6790 4996 bytes
font_01_sfnt_off00007859.bin
b23273dd79212e6480943052b971bc0559cbf489fae5dc5ac80d79abf1705c18
pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 12912 bytes