Malicious PDF — malware analysis report

Static analysis result for SHA-256 88fe1d647614086a…

MALICIOUS

PDF

34.9 KB Created: 2020-10-16 09:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d9bc1298a378af19e11232757f6d5a30 SHA-1: 1a4e12b644d3b3401d46b15f50ebc541fa5e9456 SHA-256: 88fe1d647614086a6654feac256136ea69bd859083efe5151bfbebeaa4b3933d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links designed to redirect users to external websites, masquerading as owner's manuals. The primary redirector URL is 'https://ttraff.link/pify?keyword=yamaha+mt+03+660+owners+manual', which points to a link farm hosted on disposable domains. This behavior is indicative of a phishing or scam campaign aiming to lure victims to malicious content.

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/pify?keyword=yamaha+mt+03+660+owners+manual In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5acab582ad41.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/c25f730.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/febikadunoporizedi.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/79711.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/7579313.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5648329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f8751ca358cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f87774521690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87432a619de.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/roruj-fegedevovelere-zexomojikazi-rewubujelem.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/51ad8eeff7fa53.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/adfb671b0.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/58f3ea39-6618-4cc5-b61e-a496ae0c181c/noluwivomok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85df833-7dc5-47fe-aa58-5978e4b9b345/bisuxixazoxujuzezapob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e633fd58-f5c6-4935-9e4a-67fe24547722/goxepinumar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd69555-3113-4070-a6dd-46c9fe423fb1/43390852342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b8dc26-d16f-49c8-97a7-9edfe93b486b/menilojitolup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07daf2cf-90af-4a7d-a5e8-71003ce0b28d/45615057903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f4f974-ac8a-4d59-97ba-76e40a563eb5/sosowuja.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_off00004ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EDE 5440 bytes
SHA-256: a7e82ce8022c74ca114bf18b5cc7a4f468d44239dcf715e6586877be12e82137
font_01_sfnt_off00006139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 8536 bytes
SHA-256: ec472b9d5d4d9a7d366ec6843e553a2815215d3bad7c459288954416cb2094cd