Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a29c020a0fba9f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-17 13:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5151187b193f8e2886df82d30a367a5 SHA-1: da58095e35b741bf1ce75115d9ca9a4248bb0738 SHA-256: f5a29c020a0fba9fc828da372b41a415fe85b1216627c4e2078b042fbadd92e8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains the same URL as the redirector, suggesting it is the primary lure. The presence of numerous external links, including those hosted on Shopify, indicates a link farm or SEO poisoning attempt to drive traffic to the malicious redirector.

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=introduction+aux+energies+renouvelables+pdf
    • http://nuxux.whereismyeraser.com/uploads/1/3/0/8/130874284/tebalel.pdf
    • http://nawuvi.rpmcpittsburgh.com/uploads/1/3/1/4/131407469/a0398a3c.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/58577348418.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5811/files/mojunufebapopuzufigara.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/the_astronomy_book_dk_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/6156662124.pdf
    • https://cdn.shopify.com/s/files/1/0448/1184/5793/files/14339781992.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/59523488723.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/biodiesel_from_microalgae.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/85622591976.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91489653134.pdf
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/sovomixefumozow.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_off0000667b.bin
2ebd990471e906e7167aae4b75d433b0c3515c65983c3a17be6459abc4c942bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667B 5528 bytes
font_01_sfnt_off0000795a.bin
37829c799e5fe0923222eddf1d8ca29aa8deb45619ed68fe7ed15e4fafa5dad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795A 10160 bytes

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