Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e7932b6c6cc1dc…

MALICIOUS

PDF

49.9 KB Created: 2020-08-14 10:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 965ba206433315a436e80e234e10d394 SHA-1: 211e9d37db34e222fb8d74730a46575e4d281c93 SHA-256: 74e7932b6c6cc1dc90c0ebdb9fe25802b0c16dd36e308a109772b006f5d5079e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=chrome+app+android+2.+3.+6`. The document body also contains this URL, and a heuristic indicates a 'Browser extension / update installation lure'. This suggests the PDF is designed to trick users into clicking the link to install a malicious browser component, likely leading to further compromise.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=chrome+app+android+2.+3.+6
    • http://files.rileyelizabethphotography.com/uploads/1/3/1/3/131380171/monenof.pdf
    • http://files.wattpat.co.uk/uploads/1/3/0/7/130740255/5161892.pdf
    • http://files.nebraskaarteducators.org/uploads/1/3/1/3/131379820/benaragovekisow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/assamese_babur_gaan.pdf
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/mivarirugotop.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/tutorial_dashboard_excel.pdf
    • https://cdn.shopify.com/s/files/1/0436/5657/7182/files/dopakudik.pdf
    • https://cdn.shopify.com/s/files/1/0432/1987/8048/files/kazamagake.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1158/files/50786814725.pdf
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/eatel_tv_listings.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/kakijejorarut.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/24790392903.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1400/files/buku_akuntansi_manajemen.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/bgp_attributes_explained.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/10568302156.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/what_are_core_values.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_off0000856f.bin
aa2ff93ecb1b843dcd7eeb3f306893e914bf95d9e86934f10f413a234a2064a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856F 5376 bytes
font_01_sfnt_off00009790.bin
b6bfdac208ad341f90a0ab31f59b7ef6ce8f90540610120aa7208e5eaf6b68fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9790 10292 bytes

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