Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4042d737c8f50e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 17:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 536ad01a2e3b001424d315e1549c3875 SHA-1: 784d6b5faba0f01eb30e91d8279730625615c5ce SHA-256: 1c4042d737c8f50ead114c1638cf0403ee27d5fa48ada1c9c35d34e3c5bd5568
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, pointing to 'https://ttraff.cc/wix?keyword=download+css+from+website'. The document body, though heavily obfuscated, also contains this URL and references downloading CSS from a website, suggesting a social engineering lure. The file also contains a large number of embedded links, many pointing to shopify.com, which is flagged as a link farm. No scripts were extracted from this sample.

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.cc/wix?keyword=download+css+from+website
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35117459625.pdf
    • https://cdn.shopify.com/s/files/1/0432/9357/3288/files/rick_ross_black_market_album_downloa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/20396546326.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/15229460593.pdf
    • https://cdn.shopify.com/s/files/1/0434/4915/5746/files/zojejerukojitalib.pdf
    • https://static.usrfiles.com/ugd/cc03df_d4eae6ff2fbc4b38852cb34c1ea6c72b.pdf
    • https://static.usrfiles.com/ugd/95089d_cc61ee63de514757b6ff76047d61edf7.pdf
    • https://static.usrfiles.com/ugd/b8c837_79db1b3cedb34562867ac8531568f8aa.pdf
    • https://static.usrfiles.com/ugd/7c3584_83c190f53638468da3aead3d0db2ed92.pdf
    • https://static.usrfiles.com/ugd/63d3ad_43859af061d8478bbec50c0f0434ff64.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b7.bin
7e8340b4ce9fff216f333018424bd3479287693a80c22418bb9cf8a7521d64fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B7 5188 bytes
font_01_sfnt_off00006b4b.bin
f4e65d36682aac97e72ddfaffa1d64b624de526d3ce7ecd1974a9216693b6430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4B 10744 bytes
font_02_sfnt_off00008ff5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF5 4324 bytes

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