Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60339299ea10fce…

MALICIOUS

PDF

46.8 KB Created: 2020-08-30 00:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8d7ad3a65dc1304a798caf140143fb2 SHA-1: cd382057278e8bbdedf28e09ea3ea9052f1090ce SHA-256: e60339299ea10fce859373521a17b36944d9c00abc81b92a1537ba189e24cdb7
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, with the primary link pointing to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body appears to be malformed or obfuscated, but the presence of the malicious URL and the link farm heuristic strongly suggest a malicious intent, likely for redirection or SEO abuse.

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.com/wix?keyword=science+of+creature+design+pdf
    • https://static.usrfiles.com/ugd/5438e3_c11a9dcea9984f59b8502acab9d1a164.pdf
    • https://static.usrfiles.com/ugd/b8c837_24701f51696246a39130affad968ae1a.pdf
    • https://static.usrfiles.com/ugd/b8c837_255cab9218ea446897b28ca64baf0d1b.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/apache_tomcat_for_ubuntu_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/zapatos_de_gancho_para_bebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/astronomy_and_astrophysics_in_the_new_millennium.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0666/files/gold_star_chili_application.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_60924090a15245d189c7b574fe41bd02.pdf
    • https://static.usrfiles.com/ugd/af0aa9_1e3e4c5ad1124f30a10a37acb9884d8d.pdf
    • https://static.usrfiles.com/ugd/a48928_6abf0351dc1f4dd483db9a95046f3e69.pdf
    • https://static.usrfiles.com/ugd/f84671_eb76202dcf854f88bae827dffee4fa67.pdf
    • https://static.usrfiles.com/ugd/9c0842_c28e77a8dd384851a3e19b8229e5fece.pdf
    • https://static.usrfiles.com/ugd/3f80ec_a771d8dd2c9140989a8df4ad51f73acd.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_off00007817.bin
7b47488fd860bceb29c9d410b6d6b105d5a2dc5fbcbbc56d7e002cf6c587bc78
pdf-font-stream PDF embedded font (sfnt) at offset 0x7817 5396 bytes
font_01_sfnt_off00008a6d.bin
fc4cfcc0f6cb62c65d9e8dea1b6d932f460ac4c3f00630c7b89f0717bd340546
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6D 10708 bytes