Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c5325b21a42fba…

MALICIOUS

PDF

36.6 KB Created: 2020-08-30 23:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6e92dd10c566f1c301336e590e0bf43 SHA-1: 4fff3c017bc4b2a6e097c5bfb1d119bde6ef6f84 SHA-256: a4c5325b21a42fbacad58cdaafece8c0c03f39557149bafdb2e4d70cbc01d840
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=remington+742+woodsmaster+30-06+manual'. This URL is likely used as a lure to entice users into clicking, potentially leading to a phishing page or malware download. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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=remington+742+woodsmaster+30-06+manual
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/recount_wow_addon.pdf
    • https://cdn.shopify.com/s/files/1/0459/8887/2351/files/wogumubixodogadoviwirolup.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/mei-_chan_no_shitsuji.pdf
    • https://static.usrfiles.com/ugd/277b62_fb00941174d542fe94d57bab56025d68.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/telecharger_le_journal_el_watan.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/xirelekasumuj.pdf
    • https://static.usrfiles.com/ugd/b8c837_e59049d69c4b45eb975085bc52814b9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_71bf347a23e549af87e1aa222d67113b.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_off00004f5a.bin
47f0e35cb65da40c159fa4acfe1bce7ddcd07dff7bb2b499d3bc4ade61c55aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5A 6036 bytes
font_01_sfnt_off000063ee.bin
faab09f5d6f9788a201e8f7212a8ccf98f9ddaa8fa37faca4a23399d787d7884		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EE 9968 bytes

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