Malicious PDF — malware analysis report

Static analysis result for SHA-256 938b3d4e0bd66597…

MALICIOUS

PDF

45.5 KB Created: 2020-10-16 16:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d28d396bd2f9becbb0670a39b11b178f SHA-1: f5318c906e410e127295005f0d03d3c7bd923aba SHA-256: 938b3d4e0bd665971a254eaf674b731e702ce6508449a9a47144eddecef4000f
154 Risk Score

Malware Insights

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

This PDF document is flagged as malicious due to its inclusion of a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?keyword=endless+love+imdb+parents+guide'. The document also contains a large number of external links, suggesting it is part of a link farm or SEO manipulation scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector link strongly indicate an attempt to lead the user 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 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.
  • 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://gettraff.ru/123?keyword=endless+love+imdb+parents+guide In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/cd97289c6.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8849704fc0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f880d17aef22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f889286c50a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f899b5064f7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f874291a611e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f87b57ead3f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5f8897528b7ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f8921e9969fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4544/1695/files/bat_guano_for_sale_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3441/1157/files/minegavafimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2606/3775/files/live_jazz_music_fort_lauderdale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3168/8854/files/12736389526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c36564-d00f-43dd-a8c2-8b10edd08bd0/woribomobadir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9386d0b-cd95-46d9-9fc6-f568f347bd04/53076467635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e24f8b4-eb52-41b1-be34-255fbb28d83a/46483593916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac9d28d-9037-4fdb-a18e-c99c0520ae24/wetatos.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_off00007344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7344 5436 bytes
SHA-256: 2c58de73da33af2a099a3f13e5d0df755b2350f2a7ab27b5c33d36e0ddc37ee2
font_01_sfnt_off000085a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A7 10296 bytes
SHA-256: bef73f92795ac50e5af7314de21b4b4e3b76525b2108526243b9ab29f2684169

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