Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a22f43847023960…

MALICIOUS

PDF

46.8 KB Created: 2020-09-02 09:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b80a72d0a73bd96edbc81c6a166bdbf SHA-1: f1b22b7e613b709fbb864a1d74556c51db1afb53 SHA-256: 0a22f43847023960cbd005bfda2401b264b8c16d73ed5aae293098c0734be2c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL identified is a redirector designed to lead users to potentially harmful content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm for SEO manipulation or malicious redirection.

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.club/wix?keyword=baldi%2527+s+basics+mods+easy+mode
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6cabbb_06686cfc147240d1b2e123dd2b181d01.pdf
    • https://static.usrfiles.com/ugd/5e8de6_8818a59cece044d2b6995ca9eeba88ac.pdf
    • https://static.usrfiles.com/ugd/a771bd_f16ab93e1cf14bc9870f959aa965ee69.pdf
    • https://static.usrfiles.com/ugd/891219_1e2c0d7ba1864da7a68f6d85d85b23ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_77c975ca356f4feab207798eb7a5a9c0.pdf
    • https://static.usrfiles.com/ugd/bb3bf9_4c556b012e214908b8116c8185b741e4.pdf
    • https://static.usrfiles.com/ugd/4aae87_95746396fa9042d6b305fce0677577f0.pdf
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/bescherelle_exercices_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/12754963897.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/algorithme_openclassroom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/music_notes_names_and_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/security_master_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/97059079212.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/42674576802.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/40261712927.pdf
    • https://cdn.shopify.com/s/files/1/0459/9906/3199/files/crystal_report_runtime_for_visual_studio_2008.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_off000062a9.bin
c85956e56134751eb810768514572547d9ed4af9bb19c7cc5a7a9c912edc34f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 5312 bytes
font_01_sfnt_off000074b4.bin
03708af91cf0c2876cbdd3b20b98e6181bf601bccd8ba37b946f2b2874ccb51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 10332 bytes
font_02_sfnt_off00009834.bin
91c92fab729f552433758475f1ecf6a366c66c74ae6b4dd9e31a9a0100f2b42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9834 16332 bytes

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