Malicious PDF — malware analysis report

Static analysis result for SHA-256 6885511c53497a2f…

MALICIOUS

PDF

69.6 KB Created: 2020-09-05 03:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d16c376ad61bdc1a74fc6d0837c36d5 SHA-1: aeea7e72c20d31383f17367e446afd41b87e23ab SHA-256: 6885511c53497a2f2f42756fcee8f2a361f5beefcd050f526db5144341294c55
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to potentially harmful content. The document body, though heavily obfuscated, contains text related to legal topics, likely serving as a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or content stuffing technique to improve search engine visibility for the malicious link.

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.me/wix?keyword=mandatory+minimum+laws+and+sentencing+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/63779784767.pdf
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/webikodifosobasenam.pdf
    • https://cdn.shopify.com/s/files/1/0439/1721/3851/files/15452110019.pdf
    • https://static.usrfiles.com/ugd/b8c837_db409db4f6a241769f915350bc4ae4e7.pdf
    • https://static.usrfiles.com/ugd/55cc32_1f064eddaf8042f29267755980403d5e.pdf
    • https://static.usrfiles.com/ugd/c3f88d_ec32ca2295464d609866c9a1bd9dca06.pdf
    • https://static.usrfiles.com/ugd/b5472a_47cb7f594c624ca8a749172b7ad0d5b3.pdf
    • https://static.usrfiles.com/ugd/d775a9_91d4bcb5e445458781fe2b077931687b.pdf
    • https://static.usrfiles.com/ugd/1f5cef_709094eed327457ca40c53e6468652ec.pdf
    • https://static.usrfiles.com/ugd/2c8d66_20566dd17b8b4fe597fa2e1c6f29184e.pdf
    • https://static.usrfiles.com/ugd/38bf1f_6058ac91cd1d4e1bbb2ed21f3e387ff7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c16e7e82a8a5471ca89954a7bc6e9b93.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_off0000d173.bin
76bf7ace2fa943c0e024f54a467a64f455b183b3e046126a30a3a44fcf3a6348
pdf-font-stream PDF embedded font (sfnt) at offset 0xD173 5460 bytes
font_01_sfnt_off0000e415.bin
7a27ca6bd5e79b6e6f6f7d237b8309709f308fa9bc6b8796888a5f187f29a617
pdf-font-stream PDF embedded font (sfnt) at offset 0xE415 10892 bytes