Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3e84cb5ea66c73…

MALICIOUS

PDF

50.2 KB Created: 2020-08-30 01:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bed256440783ee1d20e5e5afb2befcb SHA-1: e32fe8d9083e0712e0d9f783120f9e70b1786c0b SHA-256: 4c3e84cb5ea66c7326587ddc90da6b1eac6c432114ea871f91fd1ebd34bb5e36
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on `ttraff.ru`. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous other links to benign-looking PDFs on `cdn.shopify.com` indicates a link farm strategy, likely for SEO poisoning or to obscure the malicious destination. No scripts were extracted, and the PDF structure itself does not indicate exploitation, but rather social engineering via redirection.

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=kim+sex+tape+free
    • https://static.usrfiles.com/ugd/37321e_bae00089f12f4d03b07ea7df85b2d4fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f3cd09ffc994c1f9ca8a27c62383c76.pdf
    • https://static.usrfiles.com/ugd/5b9a87_6a7c29e61b7d48c886b1f2cd89dbcf05.pdf
    • https://cdn.shopify.com/s/files/1/0454/7385/7686/files/big_data_applications_in_healthcare.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/bogota.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/nerve_growth_factors.pdf
    • https://cdn.shopify.com/s/files/1/0431/2386/7805/files/baptism_of_fire_witcher.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/lumavavojoxubonodalutuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/sawidepaxewalo.pdf
    • https://static.usrfiles.com/ugd/735189_7034b3aa380d4b14bc0fafa06a10de04.pdf
    • https://static.usrfiles.com/ugd/b8c837_62791ce8fa0e495aa54d24cf65722194.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067b6.bin
07d15d819b0b8897d10b70f4bdabc479f972b16d796f75b0ae6935f929a89b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 5052 bytes
font_01_sfnt_off000078cb.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CB 1800 bytes
font_02_sfnt_off00008159.bin
3f8f4e850a77964a24bb82eeecea2fbbb071b1b245dbc7ab69f8e10410654997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8159 10592 bytes
font_03_sfnt_off0000a5bc.bin
6b5fadd2f52bc1ca77e7aa2b1b7aa60fe2d97728aca7f1a06ec49f887284dfb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BC 16660 bytes

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