Malicious PDF — malware analysis report

Static analysis result for SHA-256 142a2f53c8172a14…

MALICIOUS

PDF

33.9 KB Created: 2020-08-30 01:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37ae41daa02588cc25a6d1d94ff4f822 SHA-1: eeaafd4d390792ae0a0dbb6d85ed91d5f833269c SHA-256: 142a2f53c8172a1429a964f021143c2ec16a741baa6344e0c43ebac872236100
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is embedded within the document body, which also contains a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL indicates an attempt to lure the user to a harmful 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.cc/wix?keyword=being+alive+company+sheet+music+female
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_be047e588070491e8bf1849d02131b7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5ce2959be1140ceb0e46b680de0cc8e.pdf
    • https://static.usrfiles.com/ugd/136d07_0648b59860914e349028b06e05675711.pdf
    • https://static.usrfiles.com/ugd/76156b_8e9484578e7b49cf9fe09901a6700b0e.pdf
    • https://static.usrfiles.com/ugd/1e32c2_047e15fd85b94d17821013f7e7b5afc5.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2821/files/gudes.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1791/files/78240847185.pdf
    • https://cdn.shopify.com/s/files/1/0448/2813/1485/files/26882341903.pdf
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/78161329646.pdf
    • https://static.usrfiles.com/ugd/b8c837_215ee62a3a1148b38f0730dcae6314dc.pdf
    • https://static.usrfiles.com/ugd/20d83a_4d6c17dbba8a46a69e2cc609ea401a5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bbeae4b75f94631bb4c9d84a0a068ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_d36efc66e1ff4671935da6f60229f0b9.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_off000047ad.bin
c61ee8ccaa05d65987acd834d2c4c54a7a309995345a5cc514cce4d987770dea
pdf-font-stream PDF embedded font (sfnt) at offset 0x47AD 5544 bytes
font_01_sfnt_off00005a73.bin
ce2ff3f52326f35c952fb45e7b6e77a0d833617d8e95982faee77b8cec0cc1d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A73 9536 bytes