Malicious PDF — malware analysis report

Static analysis result for SHA-256 21014c2650272119…

MALICIOUS

PDF

33.4 KB Created: 2020-09-17 17:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fcda630b87aac48a34f1868a144086f SHA-1: bd830b27f5c04b187180eb17b04db932e2102c2f SHA-256: 21014c2650272119d50d1f1fc95e3aed2e60d8f680192e68a222b66df55c2d5f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches one of the identified malicious links, suggesting the document's primary purpose is to drive traffic to these malicious sites.

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=modern+taekwondo+the+official+training+manual+pdf
    • http://dabekugux.lamiragejewelers.com/uploads/1/3/1/0/131070301/8154805.pdf
    • http://files.sporkbooks.com/uploads/1/3/2/6/132696112/benomene.pdf
    • http://files.konektis.ca/uploads/1/3/1/0/131070508/zepigegaxizi_gekegaga.pdf
    • http://files.westerncanineacademy.ca/uploads/1/3/1/3/131383664/lobop.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/92554531426.pdf
    • https://5ff20563-6881-4387-b899-f6a39a205046.filesusr.com/ugd/808cd0_1cc2f51d754b4c658d187fdb05e0085d.pdf?index=true
    • https://46032d26-0161-49ab-bcb5-df44870d0ad4.filesusr.com/ugd/03dcd4_4b629aa3e3574af996cde7880b275143.pdf?index=true
    • https://d71fa68e-39fd-4ef7-bca8-b9e1f36ec952.filesusr.com/ugd/98e2de_26ceb2102f704e7487305c46e0ff5cb6.pdf?index=true
    • https://5058f485-bf18-4940-9385-12532ace4b43.filesusr.com/ugd/bb3bf9_55372571e2394ac6bf3f6716aedfc0d9.pdf?index=true
    • https://cdd7de40-ed07-4ee3-965c-c49fd2eaf3a1.filesusr.com/ugd/c70c35_d823a85133cd4cc89c94aaf1b7eaa5fe.pdf?index=true
    • https://619a9b77-79a3-4b37-824d-efc722fef763.filesusr.com/ugd/8da65f_8ca9883c3e694dcaaa1c2d3d0e360901.pdf?index=true
    • https://313c09bb-7617-4f06-8f44-46f064902ea1.filesusr.com/ugd/b48b60_19d33a5876534c96a7a369b7d3d302cd.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004310.bin
c947b1e9d541e2c4fa4a4888b739b3b86c2e5cf677a9ff16ffe826ac5a677873
pdf-font-stream PDF embedded font (sfnt) at offset 0x4310 5552 bytes
font_01_sfnt_off000055f5.bin
56471cbccb58e1d7aeff6c389e7c77cf5810bb88fa77cb6978c8d055d056fd1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x55F5 10052 bytes