Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94a87ab5f0d8bb0…

MALICIOUS

PDF

48.4 KB Created: 2020-08-30 22:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebcf59aaa1e216a9b465cb82c62aff82 SHA-1: 9ffcb194a661518f0901fd17e38102d0d1cd7cee SHA-256: f94a87ab5f0d8bb0681490c8540224ed9ed4d0888399aeab250133871f233b43
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it is a redirector link. It also exhibits characteristics of a PDF link farm, with numerous external PDF links. The primary malicious URL identified is https://ttraff.link/wix?keyword=psychic+princess+anime, which likely serves as a lure or initial stage for further malicious activity. No scripts were extracted from this sample.

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.link/wix?keyword=psychic+princess+anime
    • https://static.usrfiles.com/ugd/b8c837_200f364c922e45bb91bc11556e7d4c61.pdf
    • https://static.usrfiles.com/ugd/b8c837_f66acebd9c5a44d2b41c188da780c883.pdf
    • https://static.usrfiles.com/ugd/b8c837_20cd28342c4c4789b321a1bce7b0533a.pdf
    • https://static.usrfiles.com/ugd/9374a7_542bd25d55664154b29224a40382f516.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f3e3cad37c74af9a38918bbef1032de.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb2fd4edc2844a7b26d68894e4b97a7.pdf
    • https://static.usrfiles.com/ugd/24853a_672a5f426956484d935b11701575ec6f.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_24a8ef4039024185b7e43ab19cf6212d.pdf
    • https://static.usrfiles.com/ugd/e3ff21_ad7de169f23242a9b35dec11ef36fa70.pdf
    • https://static.usrfiles.com/ugd/b8c837_85f6f5ce8cc248e7a4413e0384b2d39e.pdf
    • https://static.usrfiles.com/ugd/41a0b6_8b6563cfa412407992f82dc7d20324aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_60a2b0324e5e4562ad4f5ea1b57b51ee.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c84.bin
cd36c1482728f62840fb2d9b3ca69c9aa2747993b407db3e8493d1550b5cb3dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C84 4004 bytes
font_01_sfnt_off00006ac6.bin
d2155d7e0c4219a14912cd222bd37ecc8df59f90129596e0e7b73c5ca5d519fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC6 5244 bytes
font_02_sfnt_off00007c68.bin
eb9039d0ee39ac85e64528bf45ff1fc932f64f3b0aa7cfac3394e9f469249b67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C68 10160 bytes
font_03_sfnt_off00009f72.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F72 16092 bytes

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