Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e3a969d2899539…

MALICIOUS

PDF

44.3 KB Created: 2020-09-04 14:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c33969859a5327aa1f7dfc9756218347 SHA-1: 9296f0c27bec13371d357f409d3af2c8619013e0 SHA-256: f7e3a969d28995390407ceb594812c6ceacb5c9068cbaa47747456a84d7fda6c
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=iucn+red+list+criteria+summary+sheet'. This URL is embedded within the document body, suggesting a social engineering lure. The file also exhibits characteristics of a PDF link farm, with numerous external links, many of which point to static.usrfiles.com. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to a malicious site via a deceptive link.

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=iucn+red+list+criteria+summary+sheet
    • https://static.usrfiles.com/ugd/b8c837_920ece2f56c643e299f179c7d6249eb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fd71d79b93a453780e69ced8386f8ef.pdf
    • https://static.usrfiles.com/ugd/ace02d_48a61ea972af460180a224031b1cfb60.pdf
    • https://static.usrfiles.com/ugd/9f69bd_a86cf22fcff84753b8c4d278770a5776.pdf
    • https://static.usrfiles.com/ugd/857e61_719ab0f157c1436fb98a5db147f6fde5.pdf
    • https://static.usrfiles.com/ugd/f84671_f848a9bd50e94692babafd5906b6bf93.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/nudivepivubikovibe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3247/5810/files/rixixakodekezu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3482/9222/files/98349659385.pdf
    • https://static.usrfiles.com/ugd/4f92c1_5b5b1e2c4b4b428ca23cc9a16e1e6897.pdf
    • https://static.usrfiles.com/ugd/3aee12_08e26066954247bfb6e2c70e84252623.pdf
    • https://static.usrfiles.com/ugd/c2bf0a_13740d76cd32421f963c49dd1a52ee4d.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_4ee734b0b03240c6afc5f7b21286f54b.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_off00006fcc.bin
549e83c47f7528e4977dbacecedf8984d55d65cda704b89cd51f47012a811211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCC 5216 bytes
font_01_sfnt_off0000815f.bin
1c737dcbd720a6b3b329ba91b3ff04b9482b0f606c8f508ab146326ca2e53b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x815F 10384 bytes

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