Malicious PDF — malware analysis report

Static analysis result for SHA-256 18be75d09b2ca540…

MALICIOUS

PDF

70.8 KB Created: 2020-09-07 23:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 024d47b50720cae344153577676a1657 SHA-1: fe96c01bd52c5a4f52d94a1fbbf17cc7571db44b SHA-256: 18be75d09b2ca5408b59bcebf59c09940c650394a8b6d34c85cf819633598e43
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 a link farm designed for SEO manipulation. One of the primary links, disguised as a game guide, redirects to malicious infrastructure at 'ttraff.club'. The ML classifier also strongly indicated maliciousness. The document's structure and embedded links suggest it is part of a phishing or redirection campaign.

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.club/wix?keyword=stalker+call+of+pripyat+weapons+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/48d9a1_c472dcea29354444a78e345bafcb1cae.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_332c34e974ff46c4a8f36a2533670a96.pdf
    • https://static.usrfiles.com/ugd/a51aec_bc727cf8ff0a4dcf885548c1cee8246c.pdf
    • https://static.usrfiles.com/ugd/de9003_94518a2cbe61421a89e1f13d3cac72e9.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/budezub.pdf
    • https://cdn.shopify.com/s/files/1/0463/3391/9393/files/wubuzonopave.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/2130374638.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/autotune_vst_plugin_windows.pdf
    • https://static.usrfiles.com/ugd/a2d007_7d71349da7894570b41123b671ca7735.pdf
    • https://static.usrfiles.com/ugd/ba3095_61c2fcae475b488d96ddc2c6885ed63d.pdf
    • https://static.usrfiles.com/ugd/90c678_a104429881fd4674a3d1b0c1a1a8d7bd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c38b.bin
948a727afcd44fb22ea155d0838a80d04bd7ea0a9d6242c75a7c97b9d72a5834
pdf-font-stream PDF embedded font (sfnt) at offset 0xC38B 5564 bytes
font_01_sfnt_off0000d693.bin
01718cc980bd312ba22ec2f1f0518930870df3bec50f7b930bdb3c716398511d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 13148 bytes
font_02_sfnt_off00010046.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 4324 bytes