Malicious PDF — malware analysis report

Static analysis result for SHA-256 604382b7f032a4cf…

MALICIOUS

PDF

43.0 KB Created: 2020-09-02 18:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c5ed4a8309bcc83dbbd69a1d34d6438 SHA-1: 67d5aad95c0b608d90b27387846ef789e81b1a72 SHA-256: 604382b7f032a4cf8b8536439c8d9e278ca51d6dcb189df1738af0baa0764c17
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Windows 10 activator key' and embedded URLs, suggesting a phishing or malware distribution lure. The presence of many external PDF links indicates a link farm, likely used to improve SEO for malicious content.

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=windows+10+activator+key
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/fivisinazazuximopigom.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/rexasomenaluk.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/60659646401.pdf
    • https://static.usrfiles.com/ugd/64d889_408d4864958f48ee82009c42772c6f5a.pdf
    • https://static.usrfiles.com/ugd/1decf9_0901080a384e4688ba11fa6e4312f4ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5220861ef264ef3be1f97b5886b8f00.pdf
    • https://static.usrfiles.com/ugd/d2b720_7cc51820a9f843f78e4e547bf3575fef.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1412/files/sowepumifofumada.pdf
    • https://cdn.shopify.com/s/files/1/0430/8870/7738/files/martyrs_of_marriage_full_documentary.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2343/files/sejozajikopegipifejulug.pdf
    • https://cdn.shopify.com/s/files/1/0430/7343/7845/files/derivatives_problems_and_solutions.pdf
    • https://static.usrfiles.com/ugd/97aff7_e91afd23ebda4f1397cb879af8523165.pdf
    • https://static.usrfiles.com/ugd/808d8c_96d2773f1f5844709310c0880a84611c.pdf
    • https://static.usrfiles.com/ugd/87a178_3ba890a54bf54bf8bd0ab3004f1a85f1.pdf
    • https://static.usrfiles.com/ugd/6d59ab_f73a24d857fd4bf0a00dbe7148cbbe9d.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_off00006949.bin
7f34927015f6b6307497dd59b9cae1c079b1398bc0e726aea33fe08ec54c6042
pdf-font-stream PDF embedded font (sfnt) at offset 0x6949 5424 bytes
font_01_sfnt_off00007bf4.bin
af0a22b8034ea4c53aff93208b6e7dfe0b35918118f0f8d75eba5f10a4977a98
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF4 10300 bytes