Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43886e631e427aa…

MALICIOUS

PDF

42.9 KB Created: 2020-11-07 22:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0e07267b7a6f1ed85b06747b40c505ad SHA-1: 3ca5dbc8e88743f8becf1ca857a1d6b985c137ba SHA-256: e43886e631e427aa6f812cf3608a5101bdffb6647d04e92d97fc27123b35fd4f
66 Risk Score

Malware Insights

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

The ML classifier strongly indicated maliciousness, and the PDF contains multiple embedded URLs, one of which points to a suspicious domain 'trafftec.ru'. The document body also contains this URL, suggesting an attempt to direct users to a potentially harmful site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=princeville+golf+course PDF link annotation
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/7f60432723aa63d.pdfIn PDF document text
    • https://bipasakugerada.weebly.com/uploads/1/3/4/3/134350286/jexenajenen.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/gakajexifike.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/2543007.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/xukonakefules/words_beginning_with_ci.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6202397e-87cf-48f1-9819-716efed924f6/93250014413.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/95519257918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b15b157-89e8-4544-8807-6a7585051c22/bavuwupedifit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c0ab37-b2b8-4bc8-a720-7ec923c84340/40578640823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a9d2c2-a225-42f4-8e2e-16a5f6e6d0d7/fujaziz.pdfIn PDF document text
    • https://dabuvosejo.files.wordpress.com/2020/11/6734663972.pdfIn PDF document text
    • https://pesasopereza.files.wordpress.com/2020/11/the_siren_kiera_cass_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc63930-3d2b-4c63-8411-7de1f583e889/zowefite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf621aa-a88f-496e-ae63-8a59aa337158/murezevobezeruvamog.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_off00006bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD1 4900 bytes
SHA-256: 3d739d1c1a9d71a5ee3a2671880917647874ff87565510f5ffbe513f5fa3340f
font_01_sfnt_off00007c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9E 9936 bytes
SHA-256: 456c4b51655bbcba4866c28870d594922c55ff8715668e608e6a8f5f4b8b6aac

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