Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f69faa7461c33a9…

MALICIOUS

PDF

44.0 KB Created: 2020-10-26 22:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8eef44df3c0b1bcc9a6c4ea513da4363 SHA-1: 2cafece5dcbe818d7f6825b1c674810b4c766a7f SHA-256: 7f69faa7461c33a91f89685daf56768251764550902638e4bd99dc9a0e89017a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a large number of external links, many pointing to disposable hosting services, and one critical link to a known malicious redirector. This structure strongly suggests a link farm designed to manipulate search engine results or phish users. The ML classifier also flagged this PDF with high confidence.

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.cc/123?keyword=cook+station+park+millersburg+indiana In PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/wuxifabasogamorodugo.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/280ba805d.pdfIn PDF document text
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/6451340.pdfIn PDF document text
    • https://jamisovuropasag.weebly.com/uploads/1/3/4/3/134396730/5e7ac523aa.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/zemokivajuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5f9333a8948f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f8d977479848.pdfIn PDF document text
    • https://defejeve.weebly.com/uploads/1/3/4/3/134386135/5815877.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/5833901.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/73fac736501.pdfIn PDF document text
    • https://jaregufadux.weebly.com/uploads/1/3/4/0/134016720/4952269.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/270ff281-6195-49e9-9bc7-57cc0b17db51/pilorepep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242b5679-4c3f-4b13-afbc-3e5611145ed0/american_girl_doll_clothes_patterns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a58a50-fe70-4191-ad05-308c0334608d/elementos_esenciales_de_la_organizacion_administrativa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394a4d18-9c27-4909-bc49-61126d4370e5/41682187344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827b52b8-43da-4cd3-b922-a0563077b264/vawavefoxuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47a6a6d-f402-486c-808e-19104ed44b4a/fafokugosibajijisizimasem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6743c27-230a-4915-8fff-400b7c05b559/petamutefogus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff67570-3ebf-4798-bfc6-3641d616a8de/ferilogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce199cd-7d10-40ad-a6cd-e672959b74ac/watch_boss_hindi_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b309c0f-e9bc-41a1-9331-2b6e06fc34a2/piano_sheet_music_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d75df0b-815d-4ed2-b129-15d73c06dd9e/58337874906.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_off00006bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAE 5388 bytes
SHA-256: 7ca30581223506b0f73a17a16a777f18ad60846a2726d5da39baf77b73f3e66d
font_01_sfnt_off00007dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDE 10684 bytes
SHA-256: ffb027bf1d1f388366d2898d16bd53ff28e5ca6b663a0f45710c103d9c757e9a