Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36242b864c8113a…

MALICIOUS

PDF

51.2 KB Created: 2020-08-29 12:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f6eb12e694fdadc5bb9358ad29c178f SHA-1: e3abe14474229c43150f80abfe8cbbb09fad6d29 SHA-256: f36242b864c8113ae865de4990476eaf61c3a993d224cd5fd966f0047490b05c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. It also contains a critical heuristic for a PDF link farm, pointing to numerous other PDFs. The primary malicious URL is https://ttraff.cc/wix?keyword=anuel+briga+com+cosculluela, which likely serves as a lure to a malicious site.

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=anuel+briga+com+cosculluela
    • https://static.usrfiles.com/ugd/b8c837_5fbe6fcce8a2413390f207758b115997.pdf
    • https://static.usrfiles.com/ugd/b8c837_4890071b2bbf4314940612ace5b2b058.pdf
    • https://static.usrfiles.com/ugd/b8c837_1047222140094212abc2e0fb59586faf.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff238bc9a5d74139b1572a6204f549ea.pdf
    • https://static.usrfiles.com/ugd/565485_91dcf261424045ee8d5b4323abbe53e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_5be36ac1631b4b15bfdcc26c2d20537c.pdf
    • https://static.usrfiles.com/ugd/b8c837_49f7236672a14310a7dd6c0d8eb3a75f.pdf
    • https://static.usrfiles.com/ugd/b8c837_013be2fdc21c4e9b97afb638a87075e5.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/62629634331.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/ripolekaxoge.pdf
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/japubamedezeretuzafe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/95868124696.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3884/files/receita_de_chimango_de_forma_simples.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f65.bin
2396573eb796ea94ebc1261114244a4f43b9867dbf4a517cd5f0769673b7fd90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F65 5248 bytes
font_01_sfnt_off00007117.bin
86bc376d2bcdc822378674ce281e17579dbed55bd1c0d26608de8cfb102caf89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7117 3300 bytes
font_02_sfnt_off00007e3c.bin
081be9d668f485672d8ed76219884fad9a87a7989ce617ef07f27a99b3ebb573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3C 13576 bytes
font_03_sfnt_off0000a994.bin
8fbf93f29a95995cc6cb645ab60f08c4727de5fe45743dfa564a7ec0a59e9085		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA994 16368 bytes

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