Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ab66a07a2d1276…

MALICIOUS

PDF

34.8 KB Created: 2020-10-04 07:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: aa10bdef81209e13b7036b0a6ad477b2 SHA-1: 4d177e45701d8d81971a4d62cbc1b2c3de82d61b SHA-256: 62ab66a07a2d1276f7a5899b767944d13ff2c05aa1f47b1c5096155553443bec
124 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains numerous embedded URLs, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs that likely serve as lures. The presence of multiple links on disposable hosting further suggests a malicious intent to direct users to harmful 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=candlelight+carol+ssa+pdf In PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/1824750650.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/81486639479.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/zusobideb.pdfIn PDF document text
    • https://site-1039197.mozfiles.com/files/1039197/vodezuvagi.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/83359294338.pdfIn PDF document text
    • http://files.creativaandco.com/uploads/1/3/0/7/130776734/3caee293dff8d8.pdfIn PDF document text
    • http://files.burbankbeat.net/uploads/1/3/2/8/132814929/xufipig.pdfIn PDF document text
    • http://files.idahowildrosefarms.com/uploads/1/3/1/8/131871778/wivivimoze.pdfIn PDF document text
    • http://resuxuv.efreewarrensburg.com/uploads/1/3/1/6/131637814/nosabeza.pdfIn PDF document text
    • http://bisuw.allaboutkidsdaycare.us/uploads/1/3/1/8/131856584/7611922.pdfIn PDF document text
    • http://files.jenaforryaneyoga.com/uploads/1/3/1/4/131453031/c731bb75270c.pdfIn PDF document text
    • http://depuferol.cogderby.org/uploads/1/3/1/3/131379724/9b280aa7909775.pdfIn PDF document text
    • http://garusi.amomentfrozen.co.uk/uploads/1/3/2/6/132682646/159342.pdfIn PDF document text
    • http://files.iscgmedia.com/uploads/1/3/1/6/131637313/6988104.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/45aa6178-7191-4ae0-85fc-119166e01cae/30052961397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6128d5d-0d40-4495-aad1-4b3bb03ea641/zebibepedaxu.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_off000049ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49EE 5320 bytes
SHA-256: 6fe3b347cb6d3d4adf9660b9a6ff458480b0b36e76da90632bee3664d1aef70d
font_01_sfnt_off00005bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFE 10076 bytes
SHA-256: 38a77cbde6c62e1b48fff50477840cc7324c2f269f26285d11b6d73f353ebb4a

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