Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6171649b34295c…

MALICIOUS

PDF

64.1 KB Created: 2020-08-31 22:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7516551ff41811d589c1799d3d14e149 SHA-1: d6fca52e64c5033e92ffb5da6b25106293748e11 SHA-256: 8b6171649b34295c158b65272b0eab5571d80af68817ce24cebd10a8125ff957
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=watch+tiger+phil+bleacher+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack vector appears to be directing users to malicious infrastructure via embedded links within the PDF.

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/pify?keyword=watch+tiger+phil+bleacher+report
    • https://static.usrfiles.com/ugd/1cfe37_64ba484f8f694ac3a3df3525d92b699e.pdf
    • https://static.usrfiles.com/ugd/b13fd1_9104019a195c4131945e841d9d5e24ac.pdf
    • https://static.usrfiles.com/ugd/74a852_e5b0d9c8ca274768ad2d072a76bc9c17.pdf
    • https://static.usrfiles.com/ugd/b98abb_7481fff6e02f46a4a162cdcf5ce3705b.pdf
    • https://static.usrfiles.com/ugd/89064d_f303bc51c118400aba7fcc7db780f014.pdf
    • https://static.usrfiles.com/ugd/ecec20_48132308bf5b436296c7948d1ba697c6.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8905/files/what_is_foreshadowing_in_literature.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42778981568.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/pakazorosemasegituvuwis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/adding_text_to_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/7975/2087/files/acellus_answer_key_math.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/98076397329.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/
    • https://cdn.shopify.com

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ae1.bin
d4cada5d7cc42b9cfeb2090906a9a62921f630eea0e411452cc6290b982d671f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE1 5172 bytes
font_01_sfnt_off00009c79.bin
ab043f0fe0e86e8f854ab163bca3a9678f95b799a6c60c7726877eedb673a1bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C79 8156 bytes
font_02_sfnt_off0000b71c.bin
54fe78261a65c8f2251077b88b5a945815f815172ce691274ed885af3e594a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB71C 10936 bytes
font_03_sfnt_off0000dc71.bin
69e9da043e5af9456dd4ae0e639303bebd5f13b05a6c1ee2518c595973fc913b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC71 16544 bytes

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