Malicious PDF — malware analysis report

Static analysis result for SHA-256 41baca18df2c8611…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 00:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e68c6e07a3cf409620dddc7d77afea9 SHA-1: a60d4a06c0eb1ab623e3a4cbc1b6cbbe0013837e SHA-256: 41baca18df2c86116c27e44c0fc54024e1bcee7fd58ae85fd606e2246fae8d24
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, specifically 'https://ttraff.com/pify?keyword=veterinary+microbiology+and+microbial+disease+pdf'. This indicates a phishing or social engineering attempt to lure the user to a malicious site. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious redirector attack.

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.com/pify?keyword=veterinary+microbiology+and+microbial+disease+pdf
    • http://files.juliemaeseele.com/uploads/1/3/1/3/131384335/davakiza.pdf
    • http://files.jandsperformingarts.com/uploads/1/3/1/4/131482853/575bb7f1.pdf
    • http://files.sweetsbyjennai.com/uploads/1/3/0/7/130775076/xadesexipejix_jifid_lewaj_xezul.pdf
    • http://files.zhiguohe.com/uploads/1/3/0/7/130775304/20b19caba8.pdf
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/47771965423.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5187/files/visit_taiwan_visa_information.pdf
    • https://cdn.shopify.com/s/files/1/0443/3071/3244/files/cashflow_101_board_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7637/files/autocad_export_margins.pdf
    • https://cdn.shopify.com/s/files/1/0434/4974/5558/files/74447203549.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/43719599322.pdf
    • https://cdn.shopify.com/s/files/1/0435/5132/6371/files/zumogerivererasaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0159/files/15805969169.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1158/files/73764207319.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/roxuno.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_off00006ee9.bin
3bc7eec9a6ce4e3d71594aaea8152bd6134404270b6ed19708f8c9b38c73a68b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE9 5684 bytes
font_01_sfnt_off00008226.bin
dc9108e4685fe4f63588104acac988a4de6ed083e19a72aaec9cde32b678c35e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8226 9924 bytes

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