Malicious PDF — malware analysis report

Static analysis result for SHA-256 63274e104477e112…

MALICIOUS

PDF

45.7 KB Created: 2020-10-14 14:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 52486d02955a9b6ee6a6685c2f121d93 SHA-1: 6c028e6bac9c37e6f2257cd79c8f1a1061fbb448 SHA-256: 63274e104477e11263cf904923a58fbb7ba54ff1350dd42a796ee026e69172f0
184 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, forming a link farm. One of these URLs, 'https://cctraff.ru/strik?keyword=my+vestige+business+plan+pdf', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be malformed or obfuscated, but the presence of the malicious redirector URL and the link farm structure strongly suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=my+vestige+business+plan+pdf In PDF document text
    • https://site-1038309.mozfiles.com/files/1038309/45894018017.pdfIn PDF document text
    • https://site-1039721.mozfiles.com/files/1039721/famubotazapedofofinodane.pdfIn PDF document text
    • https://site-1042607.mozfiles.com/files/1042607/duferixufax.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/8767144.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/32e063a95e.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/wotareropajewub.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/kezupukono.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.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/6ce20ee6-046a-4d83-a472-406e5147b74d/soxejakejij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc19576-89c4-48d9-8e62-39ebc4fc4820/nenopebapogix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e033436-a4f6-4240-87f9-af0bbf3989ed/tegibalejuzawivixixafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21e16b6-dfd6-4601-9d64-4f542b0b5928/poxewosowekilisem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9061839-a71e-4e6b-b2e8-9b79c5ce1817/16283028413.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_off00007367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7367 5420 bytes
SHA-256: 3f1b29d3c3f182a4c712eaaf155f116b0630c42e957d6539d67044e3613ccff2
font_01_sfnt_off000085f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F7 10508 bytes
SHA-256: eeb96022cd13816a0a21e4b6b83bfbb0920b73646e737f8879d5b95bfbd3fa3f

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