Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f590d56b64ebf3…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 05:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0eba415805d57c85e1e5daf7ca0cb98 SHA-1: f22538a07ebd606f671e7aff78936458fb2afd6e SHA-256: e1f590d56b64ebf31e95312e19b1ad1b3102867d32d00e3e42e5011876c190c6
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL and a string suggesting a free download lure. The PDF_SEO_LINK_FARM heuristic indicates the presence of multiple links, likely for SEO manipulation or to host further malicious content.

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=bhula+dena+mujhe+mp3+free+download
    • https://cdn.shopify.com/s/files/1/0434/8080/9622/files/kusabesofusoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/tagawowogeziligiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/arquitectura_moderna_en_brasil.pdf
    • https://cdn.shopify.com/s/files/1/0435/6364/7137/files/52312189323.pdf
    • https://static.usrfiles.com/ugd/e4a001_71e30c172c5a4befa2f69eb469ce509f.pdf
    • https://static.usrfiles.com/ugd/067ecb_d889d392920b4e05a2c3669b4b34fbd9.pdf
    • https://static.usrfiles.com/ugd/a48928_db49994085e44722a36118ac9182d7a8.pdf
    • https://static.usrfiles.com/ugd/d775a9_3032e0b70191440b8d1ed69b2463f2d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ce17a5bc9894ade9b61c46011f498d2.pdf
    • https://static.usrfiles.com/ugd/3aca14_abb3ae8a0de84ba2b787484b33587662.pdf
    • https://static.usrfiles.com/ugd/b8c837_951fbc97f0314ad6833cd4c16376dd10.pdf
    • https://static.usrfiles.com/ugd/b8c837_a234725131204072be73204f96052323.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_off00005941.bin
efad58b3d86224e912554c00aa10c24b436814fed407e6d48ff5aa362bdd08a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5941 5484 bytes
font_01_sfnt_off00006bd6.bin
1a47f296bf4c9bba797ea171f866dfdc2943a596e5abe26e44b9eb8730f3d13d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD6 14664 bytes

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