Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc3408ec86db3e7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-22 22:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84143cd83aaa66fd999c58f26994d21e SHA-1: 6c0c1b3d16a88abbc3fb726f65e56f3209ab9ed0 SHA-256: 3bc3408ec86db3e7292197a56cd17c978f031209aa7b4d5ea04305eec9fc044b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=solicited+application+letter+pdf'. This URL is presented within the document body, disguised as a solicited application letter. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or redirection strategy. The primary malicious IOC is the ttraff.cc redirector.

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.cc/pify?keyword=solicited+application+letter+pdf
    • http://files.wisdellshomes.com/uploads/1/3/1/3/131379615/xifusago.pdf
    • https://cdn.shopify.com/s/files/1/0450/9492/8537/files/gamizovutowuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/17540535000.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/25914239566.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/difference_between_businessman_and_entrepreneur.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/xisuvigimozexewakajepemas.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8327/files/wexuvawukunalunixowetu.pdf
    • https://cdn.shopify.com/s/files/1/0441/1470/6584/files/content_marketing_planning_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/jenkinsfile_code_coverage.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2633/files/84204820084.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/bevirofibijojakugideb.pdf
    • https://cdn.shopify.com/s/files/1/0464/7242/9718/files/kuduzorizulave.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_off00006010.bin
a33ea5d26c6a7e53594233413ffe0f4985465999cd61604958d9a242252c43ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6010 5072 bytes
font_01_sfnt_off0000714e.bin
0b8dc375c043b8132447f3d5e9a2b4c029e9506cbf194c99e99be054da43e5f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714E 9980 bytes

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