Malicious PDF — malware analysis report

Static analysis result for SHA-256 3507f6f87c913210…

MALICIOUS

PDF

39.5 KB Created: 2020-08-06 20:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56cbd04f8cced5bf9dee51b53bb1cd0a SHA-1: 617ec3078ebf057ebe23cecdd63a287cf528d69c SHA-256: 3507f6f87c913210528012d2fd74079d0f84d9bc7f365af3f5e55690fa2dbec1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link and a link farm. The embedded URL and the document body text both point to a lure for a 'free PDF merge' tool. The primary malicious URL identified is ttraff.ru, which is known to host redirectors. The document also contains numerous links to Shopify-hosted PDFs, likely part of a link farm to improve search engine ranking for the malicious lure.

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=merge+pdf+gratuit
    • http://files.marcusciderfest.com/uploads/1/3/0/8/130813357/dolilomu_tubireneper_womawadavalo.pdf
    • http://files.pnowebgap.com/uploads/1/3/0/8/130813639/7660659.pdf
    • http://files.mysweetblueshop.com/uploads/1/3/0/8/130814387/4332766.pdf
    • http://files.zyzzyx.band/uploads/1/3/1/3/131378952/sugetotopavifu_vuvado_bulapiku_jigakuwuru.pdf
    • http://rogivugu.galwayveterinaryhospital.com/uploads/1/3/1/4/131453541/6274948.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/universal_adobe_patcher.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/jexuwutowatilomera.pdf
    • https://cdn.shopify.com/s/files/1/0447/6986/9975/files/skyrim_ctd_fix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/77389122845.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/relonodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/zokegafiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/behavioral_specialist_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/0413/9416/files/tumisuzedozari.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/lodupuvusuzonanodusovum.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/76291708190.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/92089677380.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/21947977193.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_off00005ce5.bin
8112c577b8441ccc10026818aa0d236da86c830f63ca2cac1c283c7b26d5babe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE5 5004 bytes
font_01_sfnt_off00006e0d.bin
2ce0515d2d20f88cf9d8cb459293a2d3ed6d77025170d4e4abbb9685c537dd16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0D 10292 bytes

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