Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad8626f3249f88f…

MALICIOUS

PDF

41.1 KB Created: 2020-11-07 22:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 35aed19cbac7e61d4bd3dc8153aab6ad SHA-1: 19d6ed11b415d2e5a7e70676d2889cb4c989dad2 SHA-256: bad8626f3249f88fedef8c89185f5137a2443503dee62d9d84ee0fb8ab156830
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a PDF link farm. The primary external URI points to 'https://trafftec.ru/123?keyword=hero+simulator+crazy+games', suggesting a potential SEO manipulation or content distribution scheme. While no scripts were explicitly extracted, the heuristic 'PDF_SEO_LINK_FARM' and 'EMBEDDED_URL' indicate the document's purpose is to redirect users to external sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?keyword=hero+simulator+crazy+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412999/normal_5f97540c99110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5f8ef9998b403.pdfIn PDF document text
    • https://pefekebemapufug.weebly.com/uploads/1/3/4/3/134370705/pevifivavabiwogipeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_5f995a862dade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f895377bcf47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_5fa31e647ddea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f8b59bec6586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5fa1bc47015c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_5fa0db9de14da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8be41941f01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezetega/women_s_lacrosse_rules.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9736227e-dff2-48b2-9e2f-16097392bfe9/kedotadixelojarirujil.pdfIn PDF document text
    • https://letetuda.files.wordpress.com/2020/11/honey_select_fre_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4be501e-a588-481c-b52e-47592087d42f/hadestown_sheet_music.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_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 5232 bytes
SHA-256: 09d6bc3673c238d5837b6c8546852840b6faaf157cfa76c5e86ead3ea8ca44a9
font_01_sfnt_off0000756c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756C 10092 bytes
SHA-256: 9b0e416516e9036880f7c94a5b55b012d89396aa75b51dbcfa28400778e4311e

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