Malicious PDF — malware analysis report

Static analysis result for SHA-256 05451bbc89f4336f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 21:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: febcff71ca5dd6d15928d9e6fdf1773f SHA-1: 60279015e312cd3d89abffea5b21812ff2e94a6f SHA-256: 05451bbc89f4336f0cd4b91b85b0df38825947f906494dfeb531e8821b48b6a5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The SE_REMOTE_SUPPORT_LURE heuristic indicates the document may also try to trick users into installing remote support tools.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=individualized+health+care+plan+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/67092230609.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/xanitozorunas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/72563325369.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/vorasevekibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/41101337748.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/susarawijuzukunuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/jodirotuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8788/7526/files/16877306472.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/vekadiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/kumpulan_jurnal_akuntansi_internasional.pdf
    • https://static.usrfiles.com/ugd/5b5da7_9ecf9e4894a041c7995e0bf5ca11e246.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5d6b7df37384fc9a880e88f05fb19f3.pdf
    • https://static.usrfiles.com/ugd/97368a_c8b92cfc39c54835ac3275ce014c717f.pdf
    • https://static.usrfiles.com/ugd/4479ed_3be09773ac804ae29bcaba41b19a95ef.pdf
    • https://static.usrfiles.com/ugd/3f80ec_da6d14a637e04930bfef1e2f608ba917.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006688.bin
d64ad2fd01c849b377358fe08cf9fd61608ad7bc0972a6ecd6ff836d5300a674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6688 5184 bytes
font_01_sfnt_off0000780c.bin
6a335a8c5e20593e169ec0cacb794503703e09e2a5ae73f5bdf209c9adf39462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780C 10244 bytes

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