Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c51c4edff206b5…

MALICIOUS

PDF

47.1 KB Created: 2020-08-17 11:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f75236ff56a3bc3361fe3e717e3401 SHA-1: 081467b67df6254ff8e9225b48c890c26f4cefdb SHA-256: c9c51c4edff206b585e918983886541684502139dc5097549af973b0684ec71c
150 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links, including one pointing to a known malicious redirector at ttraff.ru. The document appears to be a link farm, with many URLs pointing to Shopify-hosted PDFs, likely as a method to distribute malicious content or engage in SEO abuse. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ausencia+de+conducta+derecho+penal+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=ausencia+de+conducta+derecho+penal+pdf
    • http://files.swimwearjunkie.com/uploads/1/3/1/8/131856394/xilizuwago.pdf
    • http://wezuve.brigantinemedia.com/uploads/1/3/2/7/132740285/rutabebikusuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/letter_to_customer_invoice_attached_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3438/6332/files/exceptional_c_herb_sutter_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3901/files/bovuwuvalulafuzuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/9427845170.pdf
    • https://cdn.shopify.com/s/files/1/0458/5432/6937/files/83512113120.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/86253808651.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/36740883174.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/bixefelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peboginesewuxexadamo.pdf
    • https://cdn.shopify.com/s/files/1/0449/8640/0936/files/90369528129.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_off000078c1.bin
33177d4cf4b2d58db33ebd95657ce8afa11b650fa33b47b19d84f5fa0031bf81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C1 5232 bytes
font_01_sfnt_off00008a84.bin
94a0dc374df8459dacfb6f7a8660fdc72f9535dd5390871f6f5683bf465aff63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A84 11028 bytes

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