Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f287a09fbf39639…

MALICIOUS

PDF

39.4 KB Created: 2020-09-05 12:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5e6b017fd665971002edc972119ebb7 SHA-1: 26449e12af47df85e6a5d6822664139d6b86417f SHA-256: 5f287a09fbf39639216195b1797c782c7c6405f2ff38db1a632172f0959da9c2
154 Risk Score

Malware Insights

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

This PDF document contains a link farm and a malicious redirector URL, indicating an attempt to direct users to harmful content. The ML classifier strongly flagged this PDF as malicious. The embedded URLs, including the primary redirector at 'https://ttraff.club/wix?keyword=billy+goat+hydro+outback+brush+cutter+manual', are the main indicators of malicious intent. No scripts were extracted, but the PDF structure itself is designed to facilitate malicious redirection.

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=billy+goat+hydro+outback+brush+cutter+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/eb4c03_6b2d024430e84892a4bb5c317738463c.pdf
    • https://static.usrfiles.com/ugd/98857b_2a181aa7a8fd4549ae3ca40498e344f9.pdf
    • https://static.usrfiles.com/ugd/3f80ec_47e8b7542d614ef08b1126dda4c5a66f.pdf
    • https://static.usrfiles.com/ugd/c34aa9_4b3b5df0fd9543f399d82a444ccebd46.pdf
    • https://static.usrfiles.com/ugd/338562_88be56152c2540f9b1621f1e03e45318.pdf
    • https://static.usrfiles.com/ugd/01bc73_4e7db45178294836855cf67bfeca75e5.pdf
    • https://static.usrfiles.com/ugd/07ef24_02b677e0cee6441c87dd744bc928f74a.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_9fd38653050148ddb8815911b295624a.pdf
    • https://static.usrfiles.com/ugd/ac51ce_eff180632b4d4df0b262c48946de2abb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8303/8874/files/chemie_formeln_liste.pdf
    • https://cdn.shopify.com/s/files/1/0428/9580/2527/files/android_arch_components_release_notes.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a9c41132ada4ed8a25eb7fa1c4e5b61.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f4a2c07e0b840fabca3136754149fbb.pdf
    • https://static.usrfiles.com/ugd/5926b4_ea83f46b231541829769ca82f9c97e56.pdf
    • https://static.usrfiles.com/ugd/0f5b72_e878edd77ea34056ab732928f7b1d232.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_off000058be.bin
7c9e2f346bf7ccf79eee5884dd66f20240f21cd0932be565161202f61a8ce47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58BE 5708 bytes
font_01_sfnt_off00006c0c.bin
12ea327bed346a2cc49f2c33c12525759393912faa832283aa2569c9fe87da0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0C 10160 bytes

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