Malicious PDF — malware analysis report

Static analysis result for SHA-256 c104157f0cbd163d…

MALICIOUS

PDF

71.8 KB Created: 2020-08-30 00:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 611c1f6a9da10799f6744bd2f6655c3f SHA-1: 35d0c60ff7c556be8cbf6bd329605ec9e8b6fa00 SHA-256: c104157f0cbd163d5624a44415046bc36e4f02cd22aeeab0669e55463a7887d9
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector hosted on 'ttraff.ru', which is flagged as malicious. This link is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also contains a large number of external links, many pointing to 'static.usrfiles.com', indicating a potential link farm or SEO manipulation tactic to distribute 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.ru/wix?keyword=nodemcu+wifi+module+datasheet
    • https://static.usrfiles.com/ugd/9757e7_7c6f56750966443ebfea736054b11273.pdf
    • https://static.usrfiles.com/ugd/067ecb_ab6634543d484b80858604ebf6b4a8e4.pdf
    • https://static.usrfiles.com/ugd/dad90e_f80d880e068d42af96cbe23b44cf3bd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c4bcfd4219a421899f64d8d8e73d6f7.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_4eeab715d08445c782de8c4764669283.pdf
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/how_to_flash_a_phone.pdf
    • https://static.usrfiles.com/ugd/b8c837_b111bcfe82c842a28e11f9337c50e9df.pdf
    • https://static.usrfiles.com/ugd/b4a829_9bbde90acd494bcc8d24e098f598e020.pdf
    • https://static.usrfiles.com/ugd/9757e7_6d0bc6390c8e49228bde7eaac2f04797.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd4141fcf85948148f7b269342f39ab0.pdf
    • https://static.usrfiles.com/ugd/b8c837_51197fdf1b66401fa2e594a0b083834c.pdf
    • https://static.usrfiles.com/ugd/8b9728_471aae6a386c447a8b41f5a32acf0118.pdf
    • https://static.usrfiles.com/ugd/9e14ca_a7a1da6b4e2a46e89f09c52a5b7ead02.pdf
    • https://static.usrfiles.com/ugd/b8c837_55e7767d0cdd483a97363b0b4daa3e13.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_off0000ce60.bin
7603dcdf90aed219cf0f144b9e714a007d83e547d72a50b845baecd8ffc6f529		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE60 5224 bytes
font_01_sfnt_off0000e01d.bin
d6ea6af48095c4aacb3946e0e8acb131e00b17cc10c65b7f8c7f14f867116e3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE01D 16312 bytes

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