Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e93b78411fadb5…

MALICIOUS

PDF

47.6 KB Created: 2020-10-10 06:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2a3bb960593fcf33a263f700f06a726b SHA-1: b480ad08b31e259a171e42ea8bb5471b4d09625a SHA-256: f5e93b78411fadb5d9835668ad9fde09d51dc5c665e88218e39fef801a4f146a
124 Risk Score

Malware Insights

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

This PDF document contains embedded links that point to a known malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://cctraff.ru/strik?keyword=call+of+duty+black+ops+glitches+zombies', which is identified as a malicious redirector. The presence of multiple links to disposable hosting further supports the malicious intent, likely to distribute further malware or phishing 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 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://cctraff.ru/strik?keyword=call+of+duty+black+ops+glitches+zombies In PDF document text
    • https://site-1040610.mozfiles.com/files/1040610/47059164739.pdfIn PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/dorigezatujikutowaxix.pdfIn PDF document text
    • https://site-1040563.mozfiles.com/files/1040563/16088757336.pdfIn PDF document text
    • https://site-1039438.mozfiles.com/files/1039438/78940314806.pdfIn PDF document text
    • https://site-1040320.mozfiles.com/files/1040320/48944958961.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/dadobukegozabizorurosago.pdfIn PDF document text
    • http://files.applewoodeventhire.co.uk/uploads/1/3/0/7/130739349/podak-mipuva.pdfIn PDF document text
    • http://files.superiorauctions.net/uploads/1/3/2/7/132712508/e6df32fcaa575d.pdfIn PDF document text
    • http://bagag.mimiscrafts.com/uploads/1/3/0/7/130739173/1131823.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/f30cdb03-bc01-43a3-8942-726ac113243f/jozaruwapibodidifaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45dc592-7122-4e32-b313-31b79f0e5cf0/65804229623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e31e800-e8d2-4765-93bf-5a2301594d1e/53942312755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6685512-fe37-43d5-8cc2-5f4646503c72/3276874280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a12a2ca-6c11-446e-a4ce-97225c893c7c/92448135326.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_off00007b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B42 5732 bytes
SHA-256: 34dd51fbafbbcc42efe72a729243d7be2f5c766dadd9421be053e904b96cd94f
font_01_sfnt_off00008eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBA 10328 bytes
SHA-256: 563a0eb56d76e1c616af822b5df2b446466d53fb66af859c856b001b5a492e46

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