Malicious PDF — malware analysis report

Static analysis result for SHA-256 8465ed96cfbd419b…

MALICIOUS

PDF

40.2 KB Created: 2020-08-18 15:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c668992429af3ce29bec2ffa5f653d4 SHA-1: 7a2516e52d0049b378c631570d1e03bf01981784 SHA-256: 8465ed96cfbd419b8bbeee6b0aa9546f217334eb63819d4668c109427d20aa70
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.cc', suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'assembler 2 pdf gratuit' and the authoring application 'wkhtmltopdf', indicating a lure for free PDF tools. The presence of many external PDF links also points to a link farm or SEO manipulation tactic.

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.cc/pify?keyword=assembler+2+pdf+gratuit
    • http://files.touchofgracehealing.org/uploads/1/3/1/4/131453249/50964b82.pdf
    • http://kemapekej.wichitammta.org/uploads/1/3/2/7/132741194/zaniwixita.pdf
    • http://files.miriamsagastiartist.com/uploads/1/3/1/4/131438142/ruzoven.pdf
    • http://files.henrysheartarttherapy.com/uploads/1/3/0/9/130969305/nujudejesivo.pdf
    • http://files.vothfamilytherapy.com/uploads/1/3/0/9/130969300/bovigojexij-rijonozup-pazidufajibesix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/54863456483.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/24551145264.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/mkdir_data_db_permission_denied.pdf
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/samum.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/gopejitag.pdf
    • https://cdn.shopify.com/s/files/1/0450/6884/5208/files/buxabinubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/selulowupipixuru.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/97388287812.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_off00005e0d.bin
7cff15a33c97a393f2693b5bb24cdac7c05dd2a2465d53c4286fe38edff4df85
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0D 5620 bytes
font_01_sfnt_off00007109.bin
f31831b9b2fa8aa8e5c47a6ec8b82ff16bc06170fbabdcc3f7f53779ff54ea26
pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 10292 bytes