Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf1da7fc9889e48…

MALICIOUS

PDF

36.7 KB Created: 2020-09-16 21:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67cc906cdbd768e26553ebf34c3627a0 SHA-1: 31adb6dd9b8ac185cf2fdbff90ad6c830023410f SHA-256: 6bf1da7fc9889e480fe43f2ef63d0e759e48356f1b32bdc1b5e11da6d88e6fc5
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free movie offer, aiming to trick users into clicking it. The document body and heuristics indicate a link farm strategy, with numerous embedded URLs pointing to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

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.link/wix?keyword=watch+divergent+full+movie+online+free+123movies
    • http://rigegor.kejoyce.com/uploads/1/3/1/3/131398234/xudafobegira.pdf
    • http://gepowut.stellarcarevacations.com/uploads/1/3/1/4/131454521/fae4180c.pdf
    • http://rojofesi.pavilionrecoveryhouse.org/uploads/1/3/0/8/130874496/2961430.pdf
    • http://files.zzomuzik.com/uploads/1/3/2/6/132681885/0700cd87d92.pdf
    • http://files.starwheelprinters.org/uploads/1/3/1/3/131398144/4e719a3ab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/jewokuvulakujivim.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/52527444614.pdf
    • https://cdn.shopify.com/s/files/1/0465/1116/1494/files/sb_admin_login_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/78669493403.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/core_java_interview_questions_for_experience.pdf
    • https://f0df0a1e-8cb0-49ca-8242-482745d7f816.filesusr.com/ugd/952c2e_f89e1d613aa0451d97c053d03a5972ff.pdf?index=true
    • https://b430f669-6cea-4c62-bfb2-5c022bffbc31.filesusr.com/ugd/95089d_541034c6934f4d128fdfae76505a22e7.pdf?index=true
    • https://56708f0a-166f-491d-8d25-378702f89ae1.filesusr.com/ugd/e643da_aa8a1a713a7d4f57804ac5a4cf921007.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/2892/8920/files/90755601685.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/malajatenugifojuzaxomiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1596/1762/files/66285309090.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/tres_metros_sobre_el_cielo_libro_completo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045eb.bin
7a59822dcad5f5a1efb81a2ace7173d8203c3c30753c192b844f3ebf35ab6e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45EB 5736 bytes
font_01_sfnt_off0000595c.bin
4d7e71a41ab0ec1e2a626679b94244fee46e442a1f006cc00413f82a960e55c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595C 8820 bytes
font_02_sfnt_off00007781.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 4324 bytes

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