Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0636c09ce378d6…

MALICIOUS

PDF

36.7 KB Created: 2020-09-02 18:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95584c115c4662d8f99eedd48b0946fa SHA-1: 4f7c193fc25abd2d9e2ebf3286679032a353cbc0 SHA-256: ff0636c09ce378d6e336a37c339d843a6bcd0dcb95784499ffcd347a9a94a3b2
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of a link farm and a redirector link. The primary malicious URL, https://ttraff.ru/wix?keyword=tamil+amman+movie+songs+free, is flagged as a malicious redirector. The document also contains numerous other links pointing to PDFs hosted on static.usrfiles.com, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. No scripts were extracted, and the document body contained mostly garbage data and the malicious URL.

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/wix?keyword=tamil+amman+movie+songs+free
    • https://static.usrfiles.com/ugd/67e251_d4a8c8725c61469b8cf340358a241883.pdf
    • https://static.usrfiles.com/ugd/b8c837_c91f7b46b6004e72a4e186cd9e11a7bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_618008f2ae2d4612b1a4364c1bd7a72d.pdf
    • https://static.usrfiles.com/ugd/b8c837_be7fa280f0f7406d832ece9bff050d7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_03e43f3c253b4dedb96b00dbd9981e3e.pdf
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/juniper_jtac_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/fufumorerisigujobukujade.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/45821155530.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/motorola_apx_4000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/jizewaza.pdf
    • https://static.usrfiles.com/ugd/bb13a2_923c4dae7b384207ada588585d5450bc.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_29beca2d785c48bfbbf7aef0507836c6.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_3f07ef11d20f497d9c29c0118af6c532.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_off0000506f.bin
36b75d060a376932f74301031756aac806baa8d533aec258231ab644d7e5e78f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x506F 5096 bytes
font_01_sfnt_off000061b8.bin
d165df212ba08592553235242ff9b0e0dffa630e3696ea2087c2f2047b1bd3f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B8 11452 bytes

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