Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcefb07e7f93a33…

MALICIOUS

PDF

44.1 KB Created: 2020-10-30 06:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 58bdeffe3a1d0b2927ef2780a18014db SHA-1: 6e82660750b2accadbad2dab44a1abaf34e55985 SHA-256: edcefb07e7f93a33c2707e674b66bcbbfc37f64772f66122c89ca3e6dfdf2202
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirector services. The primary malicious URL identified is https://ggtraff.ru/pify?keyword=you+can%2527t+make+this+change+because+the+selection+is+locked+word+mac, which is flagged as a known malicious redirector. This suggests the document is designed to lead users to malicious content through a link farm, likely for phishing or malware distribution.

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://ggtraff.ru/pify?keyword=you+can%2527t+make+this+change+because+the+selection+is+locked+word+mac In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384831/normal_5f8d74598ab0e.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/963293.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/wasalekesetowaz_wowajigotujas_medufexapisop_tugofuseba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5f96d598f114f.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/8697108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f8a61dd00d02.pdfIn PDF document text
    • https://togurekeve.weebly.com/uploads/1/3/4/0/134040335/lirebu.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/069e458d6d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_5f95a1eba4197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f91ca85f0fc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5f942fa06b04e.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/555a19b5-d003-4dc4-8dcd-cd457eb4b6ed/61670234994.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/aditya_hrudayam_telugu_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5738/7937/files/walirudukojeruvasodino.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/48261758257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5753c241-a474-4d8c-81cd-bcaf918047be/ley_de_amparo_comentada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8680/6685/files/sotosor.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_off00006c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C70 5644 bytes
SHA-256: 90f1bdc3877cf5a47cb9837acac1a6e626b78e9e961c6bc2288e7cfedfacb556
font_01_sfnt_off00007f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F92 10300 bytes
SHA-256: ac853f521a5992bb411f3d037297ed161fbff50abe223135e081c69736588cbb

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