Malicious PDF — malware analysis report

Static analysis result for SHA-256 073d453f59416040…

MALICIOUS

PDF

47.6 KB Created: 2020-09-02 01:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e519ebc9c39674cba8a836423c064b93 SHA-1: d4d1a804e3a0ae1469c631a694bea0b93053fc75 SHA-256: 073d453f59416040f3e6a4f775051d233f64a1a7c0ff38d54a5ccb240aaaa4e4
154 Risk Score

Malware Insights

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

The PDF document contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The embedded content, while appearing to be about cave tours, likely serves as a lure to disguise the malicious intent of the link. The ML classifier strongly flagged this PDF as malicious.

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=yarrangobilly+caves+self+guided+tours
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/92300740372.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/42866233288.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/bachelor_party_songs_free_320kbps.pdf
    • https://static.usrfiles.com/ugd/a421e3_1657e87dbaeb4871a64fdcccbdf7cc9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a87aba0e8764feda54d5ba9866ba59c.pdf
    • https://static.usrfiles.com/ugd/73cb9e_fb2921600c224f8f9aa9bebbf6767051.pdf
    • https://static.usrfiles.com/ugd/ca300b_5cf7a7e2febf4922ac1fc152782751f5.pdf
    • https://static.usrfiles.com/ugd/01e791_99f5a722c7304363b9221efa2b2bcb12.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_1a87044dccaa45df8d7c0a1c6602090c.pdf
    • https://static.usrfiles.com/ugd/b914b5_827d7d4034b7499da0972bf84e774ad3.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_off00007b89.bin
bb8279b6ef7d396eb644b2ba1a0420f164313ffe5ed847c82916b190d06efb6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B89 5452 bytes
font_01_sfnt_off00008e31.bin
6d5691c213fba9af32bd503a68290034e68b402a8f3fdf787b0450a375a31b13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E31 10304 bytes

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