Malicious PDF — malware analysis report

Static analysis result for SHA-256 3558ca59f7716c9f…

MALICIOUS

PDF

38.2 KB Created: 2020-08-30 19:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a533d1fe24221cef3a148aa5ff92491f SHA-1: 6e76aa9b17eea7fde1da4687850cf1554fc15982 SHA-256: 3558ca59f7716c9f0be567aaf4203728d9013e57dfa21777e0efe987f852f227
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to Shopify domains, likely as part of an SEO link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=lighting+for+digital+photography+fro'. This suggests the document is designed to redirect users to malicious infrastructure, potentially for further exploitation or phishing. No scripts were extracted, and the document body was heavily obfuscated.

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/wix?keyword=lighting+for+digital+photography+fro
    • https://cdn.shopify.com/s/files/1/0437/4983/4901/files/les_neuf_quadrants_de_l_abdomen.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/58140682124.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1846/files/jagozarowes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/balma_film_song_ming.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/48736574406.pdf
    • https://cdn.shopify.com/s/files/1/0431/7940/9568/files/jibiwitezebuwuwelixeva.pdf
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/ohmeda_biliblanket_meter_ii_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/fuxuji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/42770340326.pdf
    • https://cdn.shopify.com/s/files/1/0437/8191/4781/files/cover_letter_template_structure.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/pararezupabagimusemuxoni.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/30998794874.pdf
    • https://static.usrfiles.com/ugd/48f461_44e9e36e9ee14aab8f05e27d760c5a96.pdf
    • https://static.usrfiles.com/ugd/b8c837_00d660db7dc74301b8966681077a6c88.pdf
    • https://static.usrfiles.com/ugd/b8c837_8561ea4ef212406ea4f6aa3007d15b07.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_off000057be.bin
ce4f715ce353a60d2fef6ac27dbad086bb20ae66a4c4e14dda4e6d9543bc7d63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57BE 5168 bytes
font_01_sfnt_off00006956.bin
2e34808caf0230364bbfd6665695694e2b8c69611d782dde85209231bd474ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6956 10068 bytes

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