Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a487ba9daa5030…

MALICIOUS

PDF

50.5 KB Created: 2020-08-23 04:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c6db7a851eb617330773cca1c78419 SHA-1: dbcb16a2cf6ee2286e29c0fe5c86dc2913938289 SHA-256: e7a487ba9daa503018034af9393e6dee5abb25964316ed332931beb4c665f4f1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=aachen+tourist+information'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to a malicious site via the embedded 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.com/pify?keyword=aachen+tourist+information
    • http://files.bowandroar.com/uploads/1/3/1/4/131407767/jenexulumifopowep.pdf
    • http://files.portraits-painting.com/uploads/1/3/1/3/131384468/5419690.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6342/files/91820269995.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/42550925262.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/bosuzanutoboj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8458/6909/files/teaching_strategies_in_math.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/73624590403.pdf
    • https://cdn.shopify.com/s/files/1/0431/1770/7413/files/functional_requirements_of_roof.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3765/files/34794760581.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/90860342206.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/27571129794.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/xejalonarejalebunagoze.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/aceable_knowledge_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7701/files/arcana_heart_mugen_characters.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067e1.bin
227e1a24cb746407d1d2dac2a0d685ed25a040fd7c919cd4ba83a44445449651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E1 5076 bytes
font_01_sfnt_off000078eb.bin
6422f639f352070d8cd912c6d0d4188df8a2c144987f2beabd8cd0987f0ad296		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EB 10336 bytes
font_02_sfnt_off00009c34.bin
b52f5e948cd53cd38b02f51a7da29cf7c2288653712b93f1d33163650c720407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C34 19008 bytes

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