Malicious PDF — malware analysis report

Static analysis result for SHA-256 02eac7a767c88fab…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 15:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6f4c0797650e0deb740b814dbb674aa SHA-1: 566646840b822e0fefbf60134ebc4716eb17ad02 SHA-256: 02eac7a767c88fabeb4f373105b24729ed5b6e694a746066396ded8347862a9e
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to redirect users to malicious content. The primary redirector URL identified is https://ttraff.cc/wix?keyword=raju+gari+gadhi+online. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to manipulate search engine results for malicious purposes.

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.cc/wix?keyword=raju+gari+gadhi+online
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d7ba0f_f3d49b990e9e4bf086f86755d258c64c.pdf
    • https://static.usrfiles.com/ugd/91e123_3239486b1e644234a065414783141008.pdf
    • https://static.usrfiles.com/ugd/01bc73_ccf9770048814c69b1145fa4222d625d.pdf
    • https://static.usrfiles.com/ugd/3eed2b_11e85de8e500436cb7a58c930555d25e.pdf
    • https://static.usrfiles.com/ugd/b8c837_506ecb35fdbd4189b8bc2a72fbc73606.pdf
    • https://static.usrfiles.com/ugd/61f964_da8819201a49432ea2c1ad4b26fa5c0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2069fcc385d483c8417b5d2b6ac7d3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bfb702965b1477b80a3483ce8996ab9.pdf
    • https://static.usrfiles.com/ugd/857e61_1e352fe144364eeaa8a7d80e3a07cc5e.pdf
    • https://static.usrfiles.com/ugd/e3834b_1f19f4cb6f7a4277b428d06c37661585.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_663858d787e544dfa0687e3fa55bca22.pdf
    • https://static.usrfiles.com/ugd/b8c837_72352d5fda344b42a69c506199c407bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_abb715f4e3aa43a9b7a73ebd4768e94e.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_c30ed9847c46474d9c7b57c4229f7997.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005421.bin
dff5cfffe5177c0aca87ee126b246631e7d26f4755bc3ce6a5e6ef416e68664d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5421 4992 bytes
font_01_sfnt_off00006516.bin
c36f28064e1780092475ed66e2cd788214229681c2d11d6ff2f07cb08afd2afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6516 10380 bytes
font_02_sfnt_off000088d9.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D9 16164 bytes

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