Malicious PDF — malware analysis report

Static analysis result for SHA-256 112083b285281f1c…

MALICIOUS

PDF

35.1 KB Created: 2020-08-31 20:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ab2846ae69a2c6c80421136e02a1902 SHA-1: c0e3e0ac2deaf49c9cd743332b6bb65713111f03 SHA-256: 112083b285281f1c88fde918edd04c3c230e225a69d92d0073279f694b25223d
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/wix?keyword=behen+hogi+teri+movie++movie+counter. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, some of which are benign but others point to potentially malicious content. The presence of a 'download button' lure further supports a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=behen+hogi+teri+movie++movie+counter
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_2162611fe1b243b7a8ade55af71b7961.pdf
    • https://static.usrfiles.com/ugd/078c79_69a797eb84944326a18db9dcb2743330.pdf
    • https://static.usrfiles.com/ugd/74e9cf_cf2df24c9e7540e487eaa792348db6b4.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/gelatin_sheets_for_gingerbread_house_windows.pdf
    • https://cdn.shopify.com/s/files/1/0459/9542/5949/files/64307068438.pdf
    • https://cdn.shopify.com/s/files/1/0434/4138/9720/files/6th_grade_social_studies_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/pupasujejenawanuwopes.pdf
    • https://cdn.shopify.com/s/files/1/0452/9052/0738/files/sistema_de_gestin_de_calidad_definicin.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/68074157507.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7352/files/Android_x86_Na_stiahnutie_zadarmo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7256/files/guild_wars_2_elementalist_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/4045/4294/files/surah_ar_rahman.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_off00004d5c.bin
098141747a975a8239e59888fa01f489a8892bade8071d5345ecfb3f82272160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5C 4904 bytes
font_01_sfnt_off00005df3.bin
230232271599015f680e8d55783b39a7082f537a4d612a391ee9c898f676afb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 9864 bytes

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