Malicious PDF — malware analysis report

Static analysis result for SHA-256 4804be61fd745358…

MALICIOUS

PDF

54.4 KB Created: 2020-08-30 12:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e7933c5de429652fb6f357962ddfff2 SHA-1: 503ec451c3a52406b1c391ffb2e6de572da5eb46 SHA-256: 4804be61fd7453583155b98312acd2bb8bcb831867b61af259beaf3fc5786b42
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a download button, intended to lure the user to a malicious site. The document body, though heavily obfuscated, contains the URL that triggered the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute content widely. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=chinese+paper+cutting+templates+pdf
    • https://static.usrfiles.com/ugd/16a96a_2e1fbf67ae804b089f887dbeca4996b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_da1b1a8103a14a45aa0ef5dd491053d8.pdf
    • https://static.usrfiles.com/ugd/a91264_8f241888dca3485cadccba28aea9794c.pdf
    • https://static.usrfiles.com/ugd/f84671_37797656a6734748949b99ce574e1648.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9d183dc77f046c8b7ce682f1a421120.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/gekexazotudorimiratuvezun.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/ios_old_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/28578118439.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/29538216599.pdf
    • https://static.usrfiles.com/ugd/5bb01c_98aa811d5df14cf5b8ca5082d99f50cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_a27bbb28ce50439b840be802b573fe25.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007499.bin
b4ff125b25589bef6d2df4c610492c81fb4b1c838f37a995e222c5efdb414c94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7499 10440 bytes
font_01_sfnt_off0000965c.bin
cfae93c9c6208e089e486d9258447e8bc46d7f2141f50943d59a9ab9fc3ab578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965C 5476 bytes
font_02_sfnt_off0000a8bf.bin
d1cf8753892497eb1f443e8f4ffec873fe318644f4e29f5691d41ec9edd07b93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8BF 10616 bytes

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