Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ca84aa775e86fc…

MALICIOUS

PDF

50.5 KB Created: 2020-10-17 14:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 54d5caa5d58259f75ddd0bf2cce0d67a SHA-1: 208d56e25d31269365623a60b5de74c1ed1c6b26 SHA-256: 75ca84aa775e86fcaca62e33fe9e286463cd62b39bc185241d42b1a0db1a2e63
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, which is characteristic of a link farm designed to manipulate search engine results or distribute malicious content. One of the primary links directs to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure.

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://ttraff.link/123?keyword=audi+tt+timing+belt+replacement+guide In PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/fefem_lalaxuwe_puxepopug_nivolurofuraf.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/lagamafizo_vajugot.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/5785e88c9cd5.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/bepabexobu_xodoxavu_lenusigobu_xadutedid.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/7053729.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/32802251e3f4184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f884b1e52a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f8a787d88a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f87668b7910b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f8a517d9d1f0.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/1/0486/2964/5480/files/bipudeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6122/0006/files/45431901440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2423/8757/files/2001_arctic_cat_400_4x4_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5161/3351/files/nowine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4763/6122/files/26098582323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f11772-be73-4bb6-b5a5-f0c55d51fb9f/legubotugukov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ee6118-846e-41bf-8bbe-e9bc1061f4c8/36947804743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef494ded-5a5a-4f5a-adeb-04ca3986b1af/80051443399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d025a5f5-db58-4013-a87a-5a7a0148268b/62736671827.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_off0000863b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863B 5344 bytes
SHA-256: 2be1145ff144d33120a19a5153bb6efb81106c0dbfa0fe64610b3966f966960d
font_01_sfnt_off0000983c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983C 10640 bytes
SHA-256: a8d256420082115f55bd1dbff51f369f337332a415e0c559899e55072bfbb09b