Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a31b6610baf3f7…

MALICIOUS

PDF

47.8 KB Created: 2020-08-29 21:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fef750e4f863d9e20f3358d5c95366bc SHA-1: 2225ef93ae8396144752eb31688bd299f6fb5fa3 SHA-256: a6a31b6610baf3f718d6ace3cd059e3b3b3af1fa8acbb2c86a7157be8d583c8a
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, a technique often used in SEO poisoning or link farm attacks. One of the primary links, 'https://ttraff.com/wix?keyword=chismes+industria+farmaceutica+radio', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the link farm attack pattern. No scripts were extracted, and the primary malicious activity appears to be directing users to external, potentially harmful, websites.

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=chismes+industria+farmaceutica+radio
    • https://static.usrfiles.com/ugd/d1d005_72187bf6917046ec8f17b070cc33199c.pdf
    • https://static.usrfiles.com/ugd/b56239_18a95de2f38f4ac18c6d9a187155fa7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_530c829f3d8c4b24b6f1f7992115bfd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9468c68c203d421d9b0aad9a643e84c8.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/tapivukaduka.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/kurubamidejevake.pdf
    • https://cdn.shopify.com/s/files/1/0433/7224/9251/files/24414914362.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a7f1cb66f4347cf9df3c1238c4691dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f8b9d94ec0b4a0fae69286722a40717.pdf
    • https://static.usrfiles.com/ugd/b8c837_92acc624d2f3472e8150f51cdc7d6fa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_57978bbb18fc40db95180635c483c4db.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/acceptance_testing_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/20848219467.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_off00006fd1.bin
099779fc507b5635b3045058fb0f397582933fc4f54c86243fb6c86d37dd187c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD1 5132 bytes
font_01_sfnt_off00008110.bin
528fd970e68a9f8e242f42e256d457374295c60f00b816e9910d6dc7078cedb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8110 16040 bytes

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