Malicious PDF — malware analysis report

Static analysis result for SHA-256 8601850df0bfe004…

MALICIOUS

PDF

46.4 KB Created: 2020-10-02 22:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6202971a210384430e5a64d9965dff91 SHA-1: 5001f58c1e2d70e700a891cfa81d4c6ce6afcc56 SHA-256: 8601850df0bfe0049c2832e7eb9285ba3e25262b8a2044d1bb047cd2912bdea3
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to drive traffic to potentially harmful sites. The ML classifier strongly flagged this PDF as malicious. The document body contains the malicious URL, suggesting it's part of the lure.

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/pify?keyword=python+crash+course+pdf+reddit In PDF document text
    • http://files.dsdominion.org/uploads/1/3/1/6/131606222/kiginola-ziroguwamovo.pdfIn PDF document text
    • http://fariwo.josezayasdirector.com/uploads/1/3/1/4/131453624/9923580.pdfIn PDF document text
    • http://jasupez.hmbw.co.uk/uploads/1/3/2/3/132303307/12d8d45751c18ef.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/1/0437/2001/6021/files/41471451342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9092/1622/files/sets_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0385/9103/files/best_cat_food_for_sensitive_stomach_vomiting_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bced9f76-e138-4b1e-bdcc-cd683cc14b9f/bogip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/5681164126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/67279673960.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_off00007625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7625 5312 bytes
SHA-256: 730a1b874ff2df495230eefc9b6fa4f9276b08c8366b5ab28751f9997c4a3fd0
font_01_sfnt_off0000883a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883A 10712 bytes
SHA-256: f3876b600521d7a62bc73e4766b06b01867337f9bdf414052c9705f01de6c4ff