Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a96fb42efc220e…

MALICIOUS

PDF

45.0 KB Created: 2020-09-01 09:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7ac0d35d50e310fd734af315502b080 SHA-1: 42b151742242b458f2d160fb1ccf808280038d8c SHA-256: 06a96fb42efc220ef54c27b302f72abbafe0e0535c0973255b52bc6c9c728eac
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.me/wix?keyword=csea+union+grievance+form, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'grievance form' and the malicious URL, suggesting a phishing or scam attempt.

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=csea+union+grievance+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/kuxaropizav.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1407/files/llandudno_pier_fishing_reports.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/94605595021.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/gezotuzasejaxepuvoxojad.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/tawazivabolotexifoxekaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/zamuparolosipukudomurel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/triple_bottom_line_sustainability.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/30756099543.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/coping_with_grief_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/similar_triangles_lesson.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/69104225727.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_off00007339.bin
7b71523a8ca33aaa4f452d2fee1bd03034e60f0303f53f433fc5b3c8791a1634
pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 5132 bytes
font_01_sfnt_off000084a2.bin
406cfa1fe39892a6bd08250fb5f6305440f6094eb0545d2117c3503a0b836ff2
pdf-font-stream PDF embedded font (sfnt) at offset 0x84A2 10236 bytes