Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0d1e1ac447ba21…

MALICIOUS

PDF

42.9 KB Created: 2020-09-30 23:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3ecd8fd9b000ec3d92c52ababc8e537d SHA-1: db77976e8353158c6d5db2b10739922913e7f678 SHA-256: 7e0d1e1ac447ba2174a769d2313cde636216bf25bb74ef811a9a73d7bed54609
154 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 benign Shopify domains, but one critical link directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirect. This suggests the PDF is designed to act as a lure, potentially for phishing or to distribute further malware, by directing users to malicious content.

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://gettraff.ru/strik?keyword=workout+plans+to+lose+weight+pdf In PDF document text
    • https://site-1037055.mozfiles.com/files/1037055/83449596413.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/91188136192.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/diteked.pdfIn PDF document text
    • http://kemip.unbridled-photography.com/uploads/1/3/1/4/131452929/83fa92f8.pdfIn PDF document text
    • http://lorawek.tombacher.com/uploads/1/3/1/3/131383748/1206488.pdfIn PDF document text
    • http://files.kmagalski.com/uploads/1/3/1/4/131409909/878c20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8133/4935/files/24101322724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/51556796341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4130/0375/files/bilijutogixegixejikof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/poxenapuxupurekoxekin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/50761372611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d641915-d363-484a-8686-dca557be185f/56478797419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c9a357-0ae0-449a-b498-d35a211ac37d/81828426926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6882f55-b9a5-449b-a324-ee32f9e59782/gojazelinowene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec17386-68cc-4c38-badd-566c8e5065a3/50997999040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f75164-986d-4ae1-a4ca-c0502fd16f87/gokadosifi.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A59 5472 bytes
SHA-256: 86ab0076762fc1ec8f3071bc56b42916de1d3c190b81ed3d323149f548b23e2a
font_01_sfnt_off00007d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0E 9920 bytes
SHA-256: e820ddbcf929c2e33fd5c576f76745d9dc7d65bd9d1a3c912f160ef294d58a0e

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