Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb447d876de744df…

MALICIOUS

PDF

32.8 KB Created: 2020-08-30 18:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82d7adf9d5af6302cff0cb787dd28a70 SHA-1: 40d7951c97d3f55427bd70491e79b1b7c989800e SHA-256: bb447d876de744df8241b7bd324b9c83d489a36131c2e9220a1f2a42649d75eb
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 pointing to Shopify domains, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at https://ttraff.com/wix?keyword=dark+souls+2+achievements. The document body, though heavily obfuscated, contains text related to 'dark souls 2 achievements' and the authoring application, suggesting a lure to attract clicks. The primary attack pattern involves redirecting users to malicious infrastructure.

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.com/wix?keyword=dark+souls+2+achievements
    • https://cdn.shopify.com/s/files/1/0440/1243/7662/files/wijijuzuxogutoxejololaziv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/shareholder_value_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/7190372043.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4884/files/wugakaxigudekiv.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e88968d59744da3964ca22d0488171b.pdf
    • https://static.usrfiles.com/ugd/de02f3_0311df3e7e6c4b87b6914838ee719149.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/69762660482.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/vokura.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/skyrim_fps_counter.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6619/files/33805113250.pdf
    • https://static.usrfiles.com/ugd/cf14a4_1ba8db35fb8644238f2ad155f61e0e3e.pdf
    • https://static.usrfiles.com/ugd/b0b521_3b34239a03d840eab647cd4f0436b585.pdf
    • https://static.usrfiles.com/ugd/b8c837_78b162e72da3437086b193559b6a6bf9.pdf
    • https://static.usrfiles.com/ugd/8acad3_aca8cd85bc7f4eefa8dbfa98af7b9f34.pdf
    • https://static.usrfiles.com/ugd/b8c837_397e5adb5d71462683c20ca01294e691.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_off00004377.bin
ec5bd9f71d027b0fef449f452b42b0304403a80ba8eb921190a1fefd0099c0ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4377 5296 bytes
font_01_sfnt_off0000555f.bin
85a862f410dd75ee87dfcc183f77524a37d2e9fc0062dc6c75bc23d11d89d722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x555F 9720 bytes

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