Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba2a8ea9bc62bfc…

MALICIOUS

PDF

115.5 KB Created: 2020-08-09 23:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43a28e84420f5509e2bba1b07cb6ba37 SHA-1: c6d97dea0dcb4b3bb266d937ec1d94f582c6b284 SHA-256: 8ba2a8ea9bc62bfc7f8fa11e34bc278e894dd18bc34fc591f25133ef518e6bd0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=neural+networks+and+deep+learning+basics+pdf', is presented as a link to a PDF about neural networks, likely to trick users into clicking. Another heuristic identified a large number of external PDF links, suggesting a link farm or SEO spamming technique. The document body is heavily obfuscated but contains the malicious URL.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=neural+networks+and+deep+learning+basics+pdf
    • http://files.jimdarow.com/uploads/1/3/1/8/131856655/wivegaradifugagub.pdf
    • http://files.gocmovies.com/uploads/1/3/0/8/130813827/xovarusep.pdf
    • http://files.winstondavenport.com/uploads/1/3/1/4/131437722/janiweref.pdf
    • http://files.tallywood.com/uploads/1/3/0/7/130738673/8682229.pdf
    • http://files.thewhoresofyore.com/uploads/1/3/0/7/130738512/zetevow.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/sogipadetedop.pdf
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/fenubaxalilowojusezon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6750/5824/files/medical_billing_and_coding_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mitev.pdf
    • https://cdn.shopify.com/s/files/1/0439/1573/9304/files/pathfinder_ultimate_intrigue_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/kips_9th_class_chemistry_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6428/files/muwefaluvojiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/wixax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/forofogijatigota.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/32362586958.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/ameloblastic_fibroma.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_off000188e2.bin
61e2b450ad95ef5386d7c11064b8c90f25c35434ee63b0a1debee1eefec4190a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x188E2 5588 bytes
font_01_sfnt_off00019c09.bin
80e82103a3282a89cab4b5d3f0fd29e59ed6e0b9b1e974d4e981370af8268025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C09 10700 bytes

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