Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f9f3429c7d0bf5…

MALICIOUS

PDF

49.2 KB Created: 2020-10-28 05:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 881b460f39085644c03b448d71fe0779 SHA-1: 3154fa7112d2ff23b528259a621706edd51b9cb8 SHA-256: 03f9f3429c7d0bf5111f9543d56834287b4d1bcbdd904e48607fd594de2c0343
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier as malicious and contains numerous embedded links. One of these links, https://ttraff.ru/pify?keyword=a+love+to+last+june+14th, points to known malicious redirector infrastructure. The document body contains a mix of readable text and obfuscated content, including multiple URLs, suggesting an attempt to disguise its malicious nature.

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.ru/pify?keyword=a+love+to+last+june+14th In PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/bf0768bc9a84a.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/80750dae9.pdfIn PDF document text
    • https://rimidewazasi.weebly.com/uploads/1/3/4/3/134317879/e058df3.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/dalofa-kanezawarejosu-kasifawi.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/jozodusexomupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f94816ceb46a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f912e458e452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_5f9226268856d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f92dfa7ef19e.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/de9ce9a7-4167-478c-99fb-969a82ee5252/mijulaxup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762b0687-d976-411c-8ef5-2df682642a43/busizimivokoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da605f0-86b3-486f-857f-98b09580e7be/retail_arbitrage_amazon_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834c2460-bbb1-47db-847c-26163fcc61a1/70791321225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f489e0dc-21e6-49f9-97b3-8faa8de8a9aa/guzofijewedukadifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2824c097-ae61-4b13-ac36-b5a1b56d45f0/26414691053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334dd0d3-50af-4ac3-a678-58c1952c6209/dowuvege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbcd139f-e90e-47d5-a6f8-e025372f522d/56516770075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ebf977f-8b39-48c3-8ec7-dd1a21c26742/60517532446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835164e7-431a-437f-aa47-4ed1806bef72/supogumoparefabemofaluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9738/1782/files/binavododupisinag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/selling_leave_days_army_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2313/7461/files/webumegafomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/jemije.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_off0000827e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827E 4944 bytes
SHA-256: b8112d9d49faa6a2702da5ecb357342b288e5b3862fed6dba43368d7859ca37c
font_01_sfnt_off0000935d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935D 10584 bytes
SHA-256: 86f8e6675ec6ba3442b7990398638e2940262cb83824b4075f395e44b7cebdb9