Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b28ecf3d979d22…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 15:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e86b947d05bca15e49af0a453e4cc62 SHA-1: cfb4eae11a4b3d296390efa5d179431472a4b922 SHA-256: 68b28ecf3d979d228e92bf3869eb5cbe378b113b93f90132d2d4da4ae3719917
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a primary redirector identified as 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting it is related to a 'Kali Linux revealed book', likely a lure. The presence of multiple external PDF links, including one to 'static.usrfiles.com', indicates a link farm strategy. 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.com/wix?keyword=kali+linux+revealed+book
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_7ca48d9cf1ea42d6b622902e88f03f13.pdf
    • https://static.usrfiles.com/ugd/e643da_4f84362b9e5d487b84bdf7b56a64d35c.pdf
    • https://static.usrfiles.com/ugd/67e251_d81001290d624547a0d326c17d268a40.pdf
    • https://static.usrfiles.com/ugd/39cb9d_95ae60e3a7454a06aec7517fe153b314.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0580/files/duveno.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/fuwinudatajotizaki.pdf
    • https://static.usrfiles.com/ugd/b8c837_85d4b6f958204b24b3f2a9278f2e0a7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_8aa89042ee9c41ecb5901bec76370f92.pdf
    • https://static.usrfiles.com/ugd/cf14a4_49ea903992a14f15b9df2a506e039ef0.pdf
    • https://static.usrfiles.com/ugd/b8c837_980e1393dd6346279d5be4732cd1654f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea8cafba9c674094baad8b644d627783.pdf
    • https://static.usrfiles.com/ugd/f65518_56828132541b418e82bce5debcd8e2c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b94b05d034940d8877c2d6facf28444.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_off000068fe.bin
0d1a2da79a2291daf1b81abe164b016474b53e0ffaf26f84f2b369834112647a
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FE 4944 bytes
font_01_sfnt_off000079d9.bin
63b050c836037506c933e0af72653f1b89e3b9e366439782d977ff6befc7248d
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D9 11504 bytes