Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f1b5b30fd89fc4…

MALICIOUS

PDF

59.0 KB Created: 2020-08-31 01:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8444c8040c144f27bda12f2f75343d0 SHA-1: 1668be8ae38fdeb1f612bd525ce31882e38b0882 SHA-256: 97f1b5b30fd89fc4cfd881856743c3ad727ade250a5fd34938abdddbea67cd52
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=imagenes+del+modelo+geocentrico'. This URL is likely intended to lead the user to a malicious site. The PDF also contains a large number of external links, flagged as a link farm, further indicating malicious intent. The ML classifier strongly supports the malicious verdict.

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.me/wix?keyword=imagenes+del+modelo+geocentrico
    • https://static.usrfiles.com/ugd/60933b_2cf06997046945659ed95d8766996016.pdf
    • https://static.usrfiles.com/ugd/98857b_9b62f2802ba54d95acb836d0c438c333.pdf
    • https://static.usrfiles.com/ugd/b8c837_9624d14830c74476a1917027b3de8b7f.pdf
    • https://static.usrfiles.com/ugd/934fc3_3ba1501c04724571afb9f8dd3fc92adf.pdf
    • https://static.usrfiles.com/ugd/cc14e4_ac91c9c4f20a4f718204d5c563e87ca3.pdf
    • https://static.usrfiles.com/ugd/b8c837_52420dc35d35428d9fabd42195870765.pdf
    • https://static.usrfiles.com/ugd/b8c837_69ac3770fcc0410eac93eacff9e17f07.pdf
    • https://static.usrfiles.com/ugd/4d935e_1788d2d2e89b4c05a20438bbc8216375.pdf
    • https://static.usrfiles.com/ugd/cac9e4_5bec0b6ceb904a9baea8e7bbd173a158.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb4fea33ec3547b69151513ee97c5c2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9979734c352b4e92a8f1826d6c7d9f22.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_off0000a47f.bin
24a5b60960190b3c9ca6f34aeb7a9b0a04652cb7c38dc0f937ef5156eb249e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA47F 5196 bytes
font_01_sfnt_off0000b606.bin
45547c1b9bc50cff9239d1b89194386fd442f507e466318f4b34dbbd2ae6d664		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB606 12344 bytes

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