Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ca04ef7ec3491a…

MALICIOUS

PDF

44.5 KB Created: 2020-08-30 08:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bfd02356bd8d85d47e01d9ce8820165 SHA-1: 6e21afc04c4222c09093a58b3097457174162888 SHA-256: 10ca04ef7ec3491a347a40fbeccc7a10cce167bf0424b5a65fd2d23311bc256b
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 a malicious redirector link pointing to 'ttraff.com'. Additionally, a heuristic indicates a social-engineering lure to install a browser extension or update. The document body, though heavily obfuscated, contains the same malicious URL and several benign Shopify URLs, suggesting a link farm tactic. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=free+youtube+facebook+video+download+software
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3601/6803/files/moncayo_huapango_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/5466/8705/files/free_torch_browser_for_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/electronics_engineering_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6924/files/gazodegimiked.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/34213658114.pdf
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/nofisufemefexewatitifen.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/review_of_bilayer_tablets.pdf
    • https://cdn.shopify.com/s/files/1/0435/1351/2100/files/lugewuliratepatidisad.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/fimuxusivatiwolixiwosi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/pokemon_burning_fire_red.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/minority_report_full_movie_in_hd.pdf
    • https://cdn.shopify.com/s/files/1/0432/1289/8461/files/tejofimomakarux.pdf
    • https://cdn.shopify.com/s/files/1/0465/4769/7814/files/group_discussion_guidelines_students.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_off00006eff.bin
ec3c4dc4da881b4419556a264f6f851a3371bb0ebb67bef74c61d0ca48925d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFF 5428 bytes
font_01_sfnt_off000081a8.bin
5b47a2cb70843a62c3b6cb3b63d98ad31d7c97f976354e77c28876fe15b83f0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A8 10192 bytes

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