Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a474003875075cb…

MALICIOUS

PDF

46.6 KB Created: 2020-08-30 20:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6722c1b4b7e9f13e604547c7c62811c4 SHA-1: f13e243ac717f6a7320d8bb7d6459905a467fc9b SHA-256: 3a474003875075cb5b94a0082f4b348dc8eda671442bbde6aac84f06b3281e1f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=wowhead+blacksmithing+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://cdn.shopify.com/s/files/1/0433/5301/4423/files/limifofavovaj.pdf'. The document body, though heavily obfuscated, also contains these URLs, suggesting the primary intent is to lure the user to the malicious 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.ru/wix?keyword=wowhead+blacksmithing+guide
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/limifofavovaj.pdf
    • https://cdn.shopify.com/s/files/1/0460/2901/3151/files/juviwisafazufonono.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/absceso_cerebral.pdf
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/sisugipefipogefukimirifez.pdf
    • https://static.usrfiles.com/ugd/b8c837_48ef981763f14e7cb887befc3eb6581d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6366f00460ca466b9f98981ffee03785.pdf
    • https://static.usrfiles.com/ugd/f09a9d_d58408d0ab3b4d25b6d9036c12c5441f.pdf
    • https://static.usrfiles.com/ugd/b8c837_502f1399816e44929536504239af61e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae7da68bce8846499a4a1e36268d7291.pdf
    • https://static.usrfiles.com/ugd/b8c837_277be9e0bb5047dc8b8d9105d319aac5.pdf
    • https://static.usrfiles.com/ugd/bb13a2_139619b1e300440d8bab0e53b157e28f.pdf
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/sql_server_2008_r2_iso_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/gevefadetumemaxuzuwipol.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/aflatoxin_analysis.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_off00007888.bin
00cbadc0c302efa3d9fa017ef6120eaeb97a9760a1c6029977a3d475cc5ea29e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7888 5564 bytes
font_01_sfnt_off00008b71.bin
3e52523f407e35d107e6b85832542e60f30e1e9ea75b0e198034f8585d5448b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B71 10060 bytes

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