Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d28278636f35d7c…

MALICIOUS

PDF

32.9 KB Created: 2020-08-18 19:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ff6740a337a184910ec0f6cd64c6ec3 SHA-1: 3614b0133b00322e0314ad04da65c88f7f748371 SHA-256: 7d28278636f35d7cc302738eca6620be7182e0f09b2b1b730fe794ea1aedae1b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=feather+pen+and+ink+clipart+free'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with the primary one being 'https://cdn.shopify.com/s/files/1/0434/8366/0441/files/lugutexufodubaxus.pdf'. The document body itself is heavily obfuscated and contains these URLs, suggesting a lure to external content, likely malicious.

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=feather+pen+and+ink+clipart+free
    • http://larudet.eclectic-kids.com/uploads/1/3/1/4/131410299/rafumukaj.pdf
    • http://files.edonuwa.org/uploads/1/3/1/4/131407227/bubujad_xowowofopiki_narisewiv_kufumawilumosoj.pdf
    • http://files.bohemiansagegallery.com/uploads/1/3/0/7/130739002/3fc907b3f.pdf
    • http://zerujoji.arnikafuhrmann.com/uploads/1/3/2/7/132740228/pikuraxubarum.pdf
    • https://cdn.shopify.com/s/files/1/0434/8366/0441/files/lugutexufodubaxus.pdf
    • https://cdn.shopify.com/s/files/1/0440/2770/7557/files/pitutijidamiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/82939719091.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/nivuviduwobok.pdf
    • https://cdn.shopify.com/s/files/1/0430/8326/8257/files/autoclave_function.pdf
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/69008821492.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/cours_de_francais_niveau_debutant.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/ac_dc_big_balls.pdf
    • https://cdn.shopify.com/s/files/1/0433/7916/3285/files/swot_analysis_for_students_in_college.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/pubg_server_status.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_off0000462b.bin
7528fec966790d0c0354e2f5ef69cea4b8b9061e7e4cfb90826d154d125576c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x462B 5084 bytes
font_01_sfnt_off0000576c.bin
c29eead8b1e701d7b968bf7550acc834b1063cbfd83f76b9bdd081bbec1c599f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576C 9324 bytes

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