Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2326d78991d5514…

MALICIOUS

PDF

35.8 KB Created: 2020-08-19 06:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4781984aabfad3e4219838065683abd8 SHA-1: 3a7ee1010210b5109b2145f87a9cf516538ad006 SHA-256: b2326d78991d5514fe206599754be8b332714548365085242f223661bb6491b1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=chsp+provider+manual'. The document body, though heavily obfuscated, contains this URL and text suggesting it is a 'Chsp provider manual', likely a lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=chsp+provider+manual
    • http://files.cherylbourget.com/uploads/1/3/1/8/131856991/juditofawogozukare.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/6273051734.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/zobeburutomipedisis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/42563709317.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/11164214248.pdf
    • https://cdn.shopify.com/s/files/1/0449/3633/1419/files/no_app_found_to_open_url.pdf
    • https://cdn.shopify.com/s/files/1/0447/9972/1633/files/5702075874.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/wupebivojuzedod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5886/4028/files/vumifizuwarulum.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/95254440581.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/tree_of_savior_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/zoxaxadoziwozemifi.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_off00004fdb.bin
7ee910d754c97a326172d15b97de2862256665b710a8cf6fdb6c5cab1e5b1fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDB 5164 bytes
font_01_sfnt_off00006149.bin
fdbd4c34331164c0a33aa771c71b1336e3c5cb6f8a6add68d8fe71405470a8c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 9836 bytes

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