Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d3cbde60aabfa3…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 23:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34b4f754f41ce9aa1746f66a9e488174 SHA-1: 4dc5ad739843a71f5df00110e3fd2d7db950339e SHA-256: 13d3cbde60aabfa36b000e4cd9f464071d3a33ebe3c70739c813df7191c262b0
154 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.com/wix?keyword=effective+devops+pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded links. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an attempt to drive traffic to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=effective+devops+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_af3fb698941c4120bcebc329ca68dcf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_1babe821dd794719a6cdcf019708fff2.pdf
    • https://static.usrfiles.com/ugd/c8a981_3475d6d406754a838f9f53cf953cbe05.pdf
    • https://static.usrfiles.com/ugd/de65f7_2c4c053eb8e04ee8a1dec5799dd5ba1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_27a577f8b893433c9ea88e071f5676a5.pdf
    • https://static.usrfiles.com/ugd/de65f7_bb566bd9cda64717a31956517002c556.pdf
    • https://static.usrfiles.com/ugd/b8c837_af46178635b24690bcc99f6758291b71.pdf
    • https://static.usrfiles.com/ugd/b8c837_66a6cfa2ee224b98bf7f8cd17310c0b4.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6394/files/luxefaze.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/safety_awareness_topics.pdf
    • https://static.usrfiles.com/ugd/b8c837_d17db36ffd7a4e5c8cbb7c4f97faa918.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5e2d96e8b664eca90f671195c5a7cb4.pdf
    • https://static.usrfiles.com/ugd/cc089a_910f385a400e424fb7f374375089e1f3.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_off00006af4.bin
7c4fc4961d7f3e833de35628416c09b6c97dd7dee9b7fb321dcdbccc611fe336
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF4 4828 bytes
font_01_sfnt_off00007b88.bin
f776e2d94fffdcc6e0a8dcc3ceda44f1a8ee16964ae3a2016d575e5669079635
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B88 10208 bytes