Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac516d59b7c62ad6…

MALICIOUS

PDF

39.2 KB Created: 2020-08-30 13:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63e48e539e22c215eb7cf9b8fe98c71c SHA-1: 536fff7eee0f8acc42c445ccc9f31ce49bc42216 SHA-256: ac516d59b7c62ad6155982f90e05007ba6e98deff54e0c5cebf83008d97d74a3
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the URL 'https://ttraff.cc/wix?keyword=chinese+officer+sword', which is flagged as malicious. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing operations.

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.cc/wix?keyword=chinese+officer+sword
    • https://static.usrfiles.com/ugd/b8c837_01c0d35c53b741568e686c0c6e08911c.pdf
    • https://static.usrfiles.com/ugd/1e32c2_c478f6e375b1443fa8d086ac9299e40f.pdf
    • https://static.usrfiles.com/ugd/0adedf_6a801cda339d4635b619226c401b3725.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9e55e4022a0413fa662276bc3f6391d.pdf
    • https://static.usrfiles.com/ugd/5899d5_86a4490d346443f68c656ce5f0ba9c0c.pdf
    • https://static.usrfiles.com/ugd/7f929b_cc6dd0b2ab8949eabe72d8c475750aee.pdf
    • https://static.usrfiles.com/ugd/23e9be_041dd8ce5997446f9aaca52bfc5f1084.pdf
    • https://static.usrfiles.com/ugd/b8c837_abcc28a4d8af49968202b82dd3743905.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1b8ade76229454ea10986fb5444fb58.pdf
    • https://static.usrfiles.com/ugd/12745a_bf5baca391014171923e5c1fb14938dc.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/larokezikeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8480/8346/files/53430596756.pdf
    • https://cdn.shopify.com/s/files/1/0433/5573/4166/files/76906893459.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_off00005c48.bin
0614f29fd6917345cc0e8743567dd3b6c643b92bc827a9eabfcf7fa8797804f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C48 4864 bytes
font_01_sfnt_off00006cda.bin
48dfac1ec8aea4a109a61e6b980c65d19199b3f381605a3411f93fc1faa18bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDA 10524 bytes

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