Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d5b53aea07c6e6…

MALICIOUS

PDF

56.1 KB Created: 2020-09-18 09:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1fafcb482370f77d0207a1467d076f8a SHA-1: 4ae4f959db7ec3f866f527321fbf33457d36477b SHA-256: 67d5b53aea07c6e6e048ac21c81561f6027da9977318df43a18c12f323fb06c6
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting and are part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link, suggesting an attempt to lead the user to malicious content. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=some+days+quotes In PDF document text
    • http://zizuf.cabads.net/uploads/1/3/1/0/131071181/kiwafaxanugepagik.pdfIn PDF document text
    • http://files.abridgetoenglish.com/uploads/1/3/0/7/130740175/tijezejife.pdfIn PDF document text
    • http://files.gaindetalks.com/uploads/1/3/0/8/130874629/dojoja-kefuzegomoli-wadab.pdfIn PDF document text
    • http://tufefu.setgogym.co.uk/uploads/1/3/1/3/131379121/380208.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://259d4f1e-d336-4861-832b-fc15a12adda8.filesusr.com/ugd/3ed902_4388682250a84a05808882a979fa0acc.pdf?index=trueIn PDF document text
    • https://10cb24df-9730-4431-9546-6fb294bb40d2.filesusr.com/ugd/66f3f9_93e1fa69a179463b85076e145d8d93d9.pdf?index=trueIn PDF document text
    • https://8d7ef216-a0d7-45f5-9f1a-e0def7db7a4c.filesusr.com/ugd/fe0276_3fa0df6d5376402e805a471ccd202f2b.pdf?index=trueIn PDF document text
    • https://88590ed5-44a3-4641-9a4d-3b46e1a1c90a.filesusr.com/ugd/c63bf9_23f77eb880c3471693046f3f6a078e53.pdf?index=trueIn PDF document text
    • https://4009e31b-eab5-49f0-8232-12544d04561f.filesusr.com/ugd/89c6ad_2ab31a4bc09142c49519b7ca8540c16e.pdf?index=trueIn PDF document text
    • https://32ae7092-3237-4515-a755-450679e0726d.filesusr.com/ugd/64f9d2_ac0489743cad4f18bdccd6c8644107ec.pdf?index=trueIn PDF document text
    • https://fc5f7619-c96b-4d6b-b3c0-10c1f45d14de.filesusr.com/ugd/599026_18e08f5dfa6047bcb6b1bf79179c027a.pdf?index=trueIn PDF document text
    • https://c93bd3b5-a92a-4281-ac8d-919fa6ac8dea.filesusr.com/ugd/4fb05f_cf419a56bc4941bf9bda75413fede8a8.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/39388694359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/sample_business_plan_for_high_school_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/north_yuba_river_fishing_report.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a5dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA5DD 25624 bytes
SHA-256: 8d429fa13d916bdf11edb84ca0ecdb990360c566d4490a4e606b54f0fc6175b4
font_00_sfnt_off00007208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7208 5176 bytes
SHA-256: fcf560725c02cab8baa9c5f47207f64a965dcc56990dc8d3bea8f6aa9f76ab29
font_01_sfnt_off00008393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8393 9976 bytes
SHA-256: 68df693b34ad67882c41b8edc0e63ad3d04ea78b70f816c7d7e0aeabcee4d122