Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cdd976e1c08191…

MALICIOUS

PDF

38.3 KB Created: 2020-09-18 08:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bbb17e3c7d6dc9417eb22a88420d1a3 SHA-1: 8aa346afb6374076d17d4463230efc63f7f41c7c SHA-256: 04cdd976e1c081912581ce79b9f74dce815aca8cc2008ae9a6d1b428da32a9b9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body also contains a URL that points to a redirector, suggesting an attempt to lure users to malicious sites. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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.link/wix?keyword=tales+of+dunk+and+egg+pdf+download
    • http://tavoraput.jessicakinziehunterplatt.com/uploads/1/3/1/4/131406893/3407717.pdf
    • http://lategawi.mostlyaboutmoney.com/uploads/1/3/0/9/130969114/1034883.pdf
    • http://files.marinchorus.org/uploads/1/3/1/3/131383664/lokaxafusanobo-buzemafiza-razuxufi-baremefakot.pdf
    • https://ebooksnetwork.icu/dl.php?id=0345549392
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://47f0fcbd-9de2-41f1-bbbd-ac183378d7f6.filesusr.com/ugd/31bf02_4f0e1add18254230825dd1ce8ea5b541.pdf?index=true
    • https://0de2adef-4f84-4009-81e4-c22bed6e713d.filesusr.com/ugd/d5cf39_8195b6cf7696481a9d188eae79c41f13.pdf?index=true
    • https://b4d3d4ce-b2d6-4dfe-9633-9df3d837ee9e.filesusr.com/ugd/cc089a_14df38342196404f955c0879b958066f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/6517/2387/files/32976204737.pdf
    • https://cdn.shopify.com/s/files/1/0454/7405/4310/files/calculations_using_significant_figures_worksheet.pdf
    • https://d3c4382d-8a09-4d96-a740-3125775e859f.filesusr.com/ugd/ea2f88_0bd558e88c5f404e954ca87bee4374ac.pdf?index=true
    • https://cbabcf4e-f869-46ab-b623-791886c425c1.filesusr.com/ugd/595093_0d11a334b4124ff6aa31f58956b3c806.pdf?index=true
    • https://83d3cd48-a2d8-4e1a-b636-b0d90185de95.filesusr.com/ugd/08338c_511d8280dc67406ba958d326a9288455.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ad3.bin
91cf0879a243ee2f9c9da034329194d364f053936e0850f2a2d889bf4c51f751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD3 4972 bytes
font_01_sfnt_off00005bdf.bin
783e542a76538573e29900dd1871ee6803e7fa9f9e411e6eed68de8e00687001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDF 10060 bytes
font_02_sfnt_off00007e67.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E67 4324 bytes

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