Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fe908787eb54a7…

MALICIOUS

PDF

39.7 KB Created: 2020-09-03 02:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1873f26f14fc843defc8b4b3040567ae SHA-1: 09219a1ff5d2442be4c56d620348be6b4fcc9645 SHA-256: 09fe908787eb54a793f6a1a59be4f4225e4a62e282b209ddbf1042e7d1a34ed1
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a redirector service, which is a common tactic for phishing and malware distribution. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'Halloween party invitations templates word' and the malicious URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.club/wix?keyword=halloween+party+invitations+templates+word
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3801ff_36462e3d183a448383b38921e2ca7722.pdf
    • https://static.usrfiles.com/ugd/cc14e4_5d9f89ef03d74f3b8a91b9b7c0d316fd.pdf
    • https://static.usrfiles.com/ugd/fedf23_e046f06837784008a3cc566cc65e3d48.pdf
    • https://static.usrfiles.com/ugd/e745be_5494d5d0ec80462eac23c54ed4336e93.pdf
    • https://static.usrfiles.com/ugd/834936_f5e451f2cbc94aeeab3177778d7554a4.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/jipivivulusuke.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/nijasanito.pdf
    • https://cdn.shopify.com/s/files/1/0437/9367/8493/files/dapogedafuditufukug.pdf
    • https://cdn.shopify.com/s/files/1/0437/3040/3477/files/doraemon_cartoon_kar_do.pdf
    • https://static.usrfiles.com/ugd/21a131_fb48029210864a39b1fac8daa87be510.pdf
    • https://static.usrfiles.com/ugd/38bf1f_e5e6b5cbd6ee47efae7555187938adaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0445731655846e8bab94c08dcb1919c.pdf
    • https://static.usrfiles.com/ugd/f1d680_0acf6be6d8134f69be68174e219621cb.pdf
    • https://static.usrfiles.com/ugd/cacfd7_b4b7739a69844aa7b7a8a5119a35efbe.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_off00005d56.bin
e6e33f73f60ab458abaa393b840054ba937bc5cc779578fc7b37350897debfc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D56 5320 bytes
font_01_sfnt_off00006f6e.bin
1b1b2dc5f5bf157149f85350ac780d40f70178e2b9ba8ca7294fb162ae8cf3c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6E 10216 bytes