Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba2a94a2eb465d5…

MALICIOUS

PDF

43.7 KB Created: 2020-10-03 15:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f5ea5d8366d5019bd65d8a0e46a6c75e SHA-1: ec592d70a91d27dc86740ade437b46e939e5bcb3 SHA-256: 8ba2a94a2eb465d5c43777379cf68dd781c50083c88dea4345338d4836e5d4d8
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?keyword=beagle+breeders+wisconsin'. The document body, though heavily obfuscated, contains text related to 'Beagle breeders wisconsin' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/strik?keyword=beagle+breeders+wisconsin In PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/75686274822.pdfIn PDF document text
    • http://files.emilycatherines.org/uploads/1/3/1/3/131380021/7878104.pdfIn PDF document text
    • http://files.shinytwo.com/uploads/1/3/1/0/131070888/9589e69984.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c925c9cb-0815-452c-ba71-2888c43f68db/39520348848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c4e9f2-0367-4f4e-811c-cb9f66ebe37f/gaxafusomemuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b43ca109-b49a-4e7f-850c-5fc738474207/gudojuramoxukez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c30c970-7da8-4a92-b555-16ece3f24ca4/10419796508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/effedd68-38d3-4a7f-a5b7-650e16589a67/92436583272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9a217f-828e-43da-bad2-325f7de7b25f/27952284715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab147384-1a35-4aa8-82df-0e9a156c1183/61205467924.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_off00006b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2D 5388 bytes
SHA-256: f79fda493d4f3b3c64e54b01487d14dc2ec4a6b82edd38aa8597e1c605c14c77
font_01_sfnt_off00007d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9C 10712 bytes
SHA-256: c571c150f6412c73b0f5ce315f698924589f431af6886b1cdf30063b2cf0ddd3