Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f27d31a4110f9fb…

MALICIOUS

PDF

39.5 KB Created: 2020-09-03 03:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 921b8ad2db494c9c713992028951aa78 SHA-1: b444ee83bc3b76ba3a2cc77e2c7d9be41f8f721f SHA-256: 0f27d31a4110f9fbe6b78428d3b998e817b6c6380bcae05fde4ad42f725cbc48
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. One of the primary links, 'https://ttraff.cc/wix?keyword=tumblr+video+hd', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating its importance in the lure. The ML classifier 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.cc/wix?keyword=tumblr+video+hd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cacfd7_07faab12fa4749bca27159cdbfabce2d.pdf
    • https://static.usrfiles.com/ugd/baef12_fb69c0f3cfdd4cf580cce10ca8854dc4.pdf
    • https://static.usrfiles.com/ugd/03a576_b35ffcd7fbdf4a86b5410cae02b264e0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9181/1734/files/vusupadif.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/72557132790.pdf
    • https://cdn.shopify.com/s/files/1/0432/9757/0980/files/8459643926.pdf
    • https://static.usrfiles.com/ugd/7a359d_37dfd7a261684673aa52123a609eea36.pdf
    • https://static.usrfiles.com/ugd/440e29_7c8cb470252b4b96af9c254ef286d3b7.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_off00005e99.bin
fdbaaa2cfbb33b0fe6dc518c68fc52ba6061345068b21debc293c7ac511c9593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E99 4824 bytes
font_01_sfnt_off00006ed0.bin
ffa17dea31d030d7c56a0b54e7526e78ebe06160ed4bc8254d1419896c8e6ec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 10240 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.