Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e35d13699047f3…

MALICIOUS

PDF

43.5 KB Created: 2020-08-31 09:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b6824c74a8b583941b4ff8c65199de6 SHA-1: af260f66013f23fc8125b044f5731c6c92ded7e5 SHA-256: 98e35d13699047f3c9dccae46c6c25989b08f842d06219ea571de104067f01d9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs, a common SEO poisoning tactic. One of the primary links, https://ttraff.cc/wix?keyword=realtek+pcie+gbe+family+controller+waking+pc, is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=realtek+pcie+gbe+family+controller+waking+pc
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/wosojebujanewijiromiviv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/molopup.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/apprendre_le_francais_gratuit_debutant.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3912/files/traffic_manager_president_edition_failed_to_load.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/welaxutemiwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2856/8474/files/concurrence_monopolistique_exercice_corrig.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/xazogas.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/accounting_ratios_formulas.pdf
    • https://static.usrfiles.com/ugd/162fe6_9935ac18087549c5b8f17fdc993fe04b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fab6ea02989040ffa9f81bd0e7f73aa6.pdf
    • https://static.usrfiles.com/ugd/c1615c_675fa6c48147424fae32996a44ff879e.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/bulezekezaviperuledetivi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/80749271363.pdf
    • https://cdn.shopify.com/s/files/1/0436/0732/6882/files/77152122424.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a59.bin
406d1c45bbd4ae0f9f7c18a6bbbc82d45b3b4efb3fe3b702315db83b88265fa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A59 5564 bytes
font_01_sfnt_off00007d4f.bin
80e8906007f40d5895e3bc5b184e10e111c8ed0b4fcddad7c00521c1b75bfc81
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4F 10472 bytes