Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f437b89b680d06…

MALICIOUS

PDF

52.3 KB Created: 2020-09-02 10:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b0b0ad6fdfb27352b8de7bae67cdb37 SHA-1: c54d9d516faf26e4f4cd37a2d2ca327c4f35bcd9 SHA-256: 38f437b89b680d06c8fd2d1a28206bd54a0fb75d35a09911bb75c9b4d5b2ff15
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, which is also present in the document body. This link, 'https://ttraff.me/pify?keyword=ramsay%2527+s+kitchen+nightmares+usa+episode+guide', is designed to lure users to a malicious site. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to benign content but likely serving to obscure the malicious one. The primary intent appears to be directing the user to the malicious 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.me/pify?keyword=ramsay%2527+s+kitchen+nightmares+usa+episode+guide
    • https://static.usrfiles.com/ugd/824332_275b044008a54a99bbfe0c6b88b747bd.pdf
    • https://static.usrfiles.com/ugd/941881_2e6a37a9715e41eeab37209384c8b3af.pdf
    • https://static.usrfiles.com/ugd/74147a_dc40dc28c098435397c2c1d2c06978a7.pdf
    • https://static.usrfiles.com/ugd/f35da0_992a780c8845447181dcd9d43234deda.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_ab91fb60a8544b7786bd39a9648c9adc.pdf
    • https://static.usrfiles.com/ugd/e73fea_2c25a369965746fba33b6dc81156e433.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/86194812734.pdf
    • https://cdn.shopify.com/s/files/1/0464/3133/8648/files/theme_of_the_alchemist.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/85860544375.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/sine_pulse_width_modulation.pdf
    • https://cdn.shopify.com/s/files/1/0435/9284/3422/files/come_down_o_love_divine_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/35171784754.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/fojabajabikewofabu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6050/9337/files/68263611893.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_off000083a0.bin
1079d44702b96ac1f37943d8a8d9ea5d9433512b387e77a029c3297396b96e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A0 5664 bytes
font_01_sfnt_off000096db.bin
52fd43248173991ebbfd7018daa9e9048d452f53132050c1a57a4553676b0465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96DB 13636 bytes

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