Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4bf6e227a01751…

MALICIOUS

PDF

56.3 KB Created: 2020-09-08 14:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7eda19c143767975b0c6fa1e6d280377 SHA-1: ac56a31d70d3e5ddfbeeabc63041671d9e3e2070 SHA-256: 7b4bf6e227a01751e3668d1e6992a9e6cd79f0157f7b534c2bab6d40d21a90e2
168 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/wix?keyword=adobe+flash+player+para+android+2019'. This URL is presented as a lure for downloading a fake Adobe Flash Player update, a common social engineering tactic. The document also contains a high-confidence heuristic for a browser extension/update installation lure, reinforcing the malicious intent. While numerous other benign URLs are present, the critical redirector link and the social engineering lures strongly indicate a malicious workflow designed to trick the user into downloading further malware.

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=adobe+flash+player+para+android+2019
    • https://static.usrfiles.com/ugd/2b25b5_200fef49c91a4d16a98a59e7704392ed.pdf
    • https://static.usrfiles.com/ugd/b444d4_2f950485a2cc451abd0e61e6ba65821d.pdf
    • https://static.usrfiles.com/ugd/f4de5e_7239738e1c004deab33d7cace0906dc3.pdf
    • https://cdn.shopify.com/s/files/1/0435/4208/5783/files/16128720194.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/diwimitisisivokon.pdf
    • https://cdn.shopify.com/s/files/1/0434/1651/8805/files/19713575270.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/mivezebinapunaroka.pdf
    • https://static.usrfiles.com/ugd/b42fd6_4c4d43f9789243fb815ba0b346574183.pdf
    • https://static.usrfiles.com/ugd/9fc8c3_c0663df4fd264bc2b70daef70fb2623a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/60331048796.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/94696861558.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_off00006c6f.bin
8ffa0a7012bdbc979f05a63d7f75e73875829669dce55cdcbc4c4d8d4cc6eb8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 6832 bytes
font_01_sfnt_off00007dbf.bin
34bb875450bb4e3dfe8e2bf46612e2b93efc9602ea3f8aa48bee85ca76b160f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 5844 bytes
font_02_sfnt_off000091a0.bin
12aab8becbdc8347a24880f1aa0d3e6195b2f58a14ff21359ac29f3f1145c345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A0 13980 bytes
font_03_sfnt_off0000bdf7.bin
7f7a064eb72c1950057c4b5818e74c9c738203a5ae22394c32c93de0958da170		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF7 16316 bytes

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