Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a97f25b4635fba7…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 21:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25fe6d13789204c5181814ac004a1b72 SHA-1: 22c81c97033f92a86a33499568e57d7cbcf13653 SHA-256: 0a97f25b4635fba7e9e2a6830a8b596ed448eb44159b4c2670f3b2c716084fa5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary URL identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly suggests malicious intent, likely to redirect users to a harmful site. The 'PDF_SEO_LINK_FARM' heuristic indicates a tactic to manipulate search engine results or distribute malicious content through a large number of links.

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.ru/wix?keyword=the+path+of+least+resistance+pdf+rob
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f1d680_c5e01a3cdc86403ea2369a501e777bd0.pdf
    • https://static.usrfiles.com/ugd/a107db_8205bc26abcf4445a3bb27950c175401.pdf
    • https://static.usrfiles.com/ugd/d4da64_67a39af60e964325a06881ad235a6eff.pdf
    • https://static.usrfiles.com/ugd/b8c837_d238e8a2d67e4e41911288f40a2d4cc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0dd76032c2fb4879846c6c50cf3f39df.pdf
    • https://static.usrfiles.com/ugd/b8c837_15cfa1df6a6b40629bd62e4127114e41.pdf
    • https://static.usrfiles.com/ugd/19ce5d_005026e769954b9ea96a9d3c16dd9d98.pdf
    • https://static.usrfiles.com/ugd/b8c837_bae56ad67da3462f8dacc92f8a6e8a12.pdf
    • https://static.usrfiles.com/ugd/0c41e7_aeb8779aa80141e1afcd71a2f1f5f896.pdf
    • https://static.usrfiles.com/ugd/bf650e_e3b7c94681d845d68307f6d650f5d215.pdf
    • https://static.usrfiles.com/ugd/b8c837_84afb516428d45e69379c618e354cae9.pdf
    • https://static.usrfiles.com/ugd/23e9be_31181af1c0204596960c0a035632ee07.pdf
    • https://static.usrfiles.com/ugd/760101_f7c92a5011034f46a626767fb5dd729a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006237.bin
4e61343a9149f0a9dec9aeacb442244eb14214e4543a265db28a4d39b7489e7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6237 5332 bytes
font_01_sfnt_off00007448.bin
38fb208dd57fa760515fa7d838e2093b726208c2555ece9cef259a35cd091fd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7448 10312 bytes