Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e997b12543c1cc7…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 08:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0c465583fc9cf6c6a2b227c6847d991 SHA-1: c1242ea0706b22fbf47372a7decb23f837e4b903 SHA-256: 5e997b12543c1cc74600d6aa917c19cc36b64d962e43afd0561a41bc0e2a0b42
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, a common tactic for SEO link farms and potentially malicious redirection. One prominent URL, https://ttraff.com/wix?keyword=iso+9004%253A+2018+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify and static hosting services, likely as part of a link-building scheme or to host further malicious content. The ML classifier strongly indicates maliciousness.

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=iso+9004%253A+2018+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/mechanics_of_fluids_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/5376570581.pdf
    • https://cdn.shopify.com/s/files/1/0436/0581/9550/files/jogixu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/pathfinder_inner_sea_bestiary.pdf
    • https://static.usrfiles.com/ugd/b8c837_53dc5c50d03d4dca8048a1457711c668.pdf
    • https://static.usrfiles.com/ugd/de60da_e88d5b94bed6432a988e123cff2494dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_f387e4aade1d4fa9b16ff9bab8f379b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_215ee62a3a1148b38f0730dcae6314dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb3b2affd0d54926af29c3c74cd786f5.pdf
    • https://static.usrfiles.com/ugd/eed56f_abb6b72af57346c49245c445a1f4c37b.pdf
    • https://static.usrfiles.com/ugd/724fb5_053e3ae86e104f5da9be7fdf5f7cff41.pdf
    • https://static.usrfiles.com/ugd/b8c837_caba378897434a4e9a4c7be3dabc2fbf.pdf
    • https://static.usrfiles.com/ugd/1e32c2_76771a50ec394b57bfb98bc4cd0a18ee.pdf
    • https://static.usrfiles.com/ugd/ea78e0_74f782a9417544efbdc27ca95aca7198.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_off00006310.bin
905b9b14bc5c680eefcd9ed18024e133d0b3c5a74b4412a92e50fb7012db09db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 5448 bytes
font_01_sfnt_off000075b2.bin
ecd70d0e442c880c62017f011d6dcad9dd103718f157c5fdd40cf9c3d1476edb
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 9880 bytes