Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f68fdbb676ac2c7…

MALICIOUS

PDF

31.5 KB Created: 2020-08-21 15:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94b320607de0a36f39e6e57d7bd2f4c6 SHA-1: fa3c42ecc261e7a9c6aa728b4db843d56323c4b8 SHA-256: 5f68fdbb676ac2c7e2466c0047658b6a2c992f47e62accfbdcce872c2efb8b1b
194 Risk Score

Malware Insights

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

The PDF document contains a lure claiming "Charter spectrum cable guide not working" and embeds numerous links, including one to a known malicious redirector at https://ttraff.cc/pify. This suggests a social engineering attack aimed at directing users to malicious infrastructure, likely for credential harvesting or further malware delivery. The presence of a browser extension installation lure further supports this malicious intent.

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=charter+spectrum+cable+guide+not+working
    • http://files.ayersengraving.com/uploads/1/3/0/7/130775977/manakopowumipof.pdf
    • http://files.thesoundhealing.com/uploads/1/3/0/7/130738794/cc29a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/30305990120.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/ways_to_increase_self_esteem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/dekoguresebovavenozet.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/pezivafuliti.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/58273932440.pdf
    • https://cdn.shopify.com/s/files/1/0440/4363/2805/files/notipefare.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/sharper_image_dx_4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/candle_making_books.pdf
    • https://cdn.shopify.com/s/files/1/0435/7203/5739/files/minecraft_ps3_seeds_2016.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_off00003fd8.bin
1e0e0d95d2d73022aec011ed6275e32f3284f1f3bfcba154c3fcf410a927ade5
pdf-font-stream PDF embedded font (sfnt) at offset 0x3FD8 5688 bytes
font_01_sfnt_off00005318.bin
90d8b78ee34baf6a15df5b963cd294768be693d635c0e4bc54522dc0d7038f18
pdf-font-stream PDF embedded font (sfnt) at offset 0x5318 8876 bytes