Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3bc330d2261fc2a…

MALICIOUS

PDF

39.2 KB Created: 2020-09-09 06:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57bc0f15e6542983fdb2eafb4b6a5a6c SHA-1: 69b03e786126bc20de28453d799e718cb850e1fb SHA-256: f3bc330d2261fc2a3309836c4cb5387590f410f802c918d6e5aa5cf4737c998e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of these links, https://ttraff.club/wix?keyword=psionic+character+sheet+3.+5, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for a 'psionic character sheet'. The primary attack pattern involves tricking the user into clicking the malicious link, leading them to the 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.club/wix?keyword=psionic+character+sheet+3.+5
    • https://static.usrfiles.com/ugd/451a43_894009a3bffa41b9aa50c36641d35d55.pdf
    • https://static.usrfiles.com/ugd/362633_587085a7cde7443f8cc3da9ef8c1710f.pdf
    • https://static.usrfiles.com/ugd/3fb742_559f4eaf6c664ebe8ea7f5bad5b24b65.pdf
    • https://static.usrfiles.com/ugd/625844_69fe9e8f5cfc4815beb27b1b011a550e.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_86e93ea9c88a4e2d872f3b2db3e18127.pdf
    • https://static.usrfiles.com/ugd/e8506d_db97509f43bd44ea93fc064640a98000.pdf
    • https://static.usrfiles.com/ugd/1715bf_2a63346c073542288aa18fdce849c3c0.pdf
    • https://cdn.shopify.com/s/files/1/0437/7883/4583/files/fexedikesuzetopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/convert_degree_to_radian.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/tscab_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/kiloteradikilosur.pdf
    • https://static.usrfiles.com/ugd/bd7df1_848f2d626bf0423491db79260c925d36.pdf
    • https://static.usrfiles.com/ugd/0994f9_c37122a9a19147099391a11abee63912.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_off00005b39.bin
091222aabef6cd38aa5d2c1de34fc25adac545f14ff805bab8d37de747fd22c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B39 5176 bytes
font_01_sfnt_off00006cd7.bin
5b49f652cdd5e4a77498da8488293760e948d7b5c1f818129a60eab1b46921d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD7 10288 bytes

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