Malicious PDF — malware analysis report

Static analysis result for SHA-256 c226ff1d935c12f5…

MALICIOUS

PDF

39.7 KB Created: 2020-09-06 09:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab79ac16237ab5a828db59e7b7f6c932 SHA-1: 959ad180a9ffe7a1d0740a08e1456476023eb6a4 SHA-256: c226ff1d935c12f579fc8eb691318c674206ef75c4fe4b530f0df5277b1cecc4
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, indicating an attempt to drive traffic to malicious infrastructure. The primary attack vector appears to be a malicious link embedded within the PDF, designed to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=analog+lab+plugin+free
    • https://static.usrfiles.com/ugd/83e24f_4e403eabcc4a42b5bdd6d8036823c861.pdf
    • https://static.usrfiles.com/ugd/ab059d_0da470c67b3a41f2ae36662cced977be.pdf
    • https://static.usrfiles.com/ugd/3f80ec_cd7b0d6c37894eb8b60488b1e12b67eb.pdf
    • https://static.usrfiles.com/ugd/948cea_437fb57afeee43df858ba2ef4fbfad18.pdf
    • https://static.usrfiles.com/ugd/a771bd_017cd38264ff4d5e8ed62a3bc8531782.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/54466188099.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/populating_next_right_pointers_in_each_node.pdf
    • https://static.usrfiles.com/ugd/18f527_8f8b895c460e44588461175a2b51a59b.pdf
    • https://static.usrfiles.com/ugd/97368a_acb92bea1c694194a0b83e221be4da21.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4065/files/lasagna_pasta_sheets_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/zezeluxoxuwelitex.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/tokutirilizafip.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_off00005db4.bin
5a76068f09e2392e9576bf1ae429d132b0e8ffa793266accb38208d96997e142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB4 5020 bytes
font_01_sfnt_off00006edc.bin
eff20ef07b48524e1048866f07ddc17ff21a5de557030a7bc9feb27224b2951f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDC 10460 bytes

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