Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c8e75e78671cf5…

MALICIOUS

PDF

64.3 KB Created: 2020-10-17 10:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6b8f55b02d27a3876137e9e5d543c21b SHA-1: 214754a954566b371def119db7d41ba67cbad7f8 SHA-256: 77c8e75e78671cf5beaeee111ad15f7337ede7c6a875b6f57d1d6169a3f9e9cd
184 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to disposable hosting services, indicating it functions as a link farm. One prominent URL, 'https://cctraff.ru/123?keyword=live+net+tv+for+android+tv+box', is flagged as a malicious redirector. The document's structure and the presence of these links suggest an attempt to manipulate search engine results or direct users to potentially harmful 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://cctraff.ru/123?keyword=live+net+tv+for+android+tv+box In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f8a811786922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f897e5fc3afe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f87a0b791d7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5f8a19b33e2e3.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bf4458.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/9620827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f88993fae263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f89caa5ec578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5f89e92779336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f875dfa43722.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/4290719.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/6704627.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/4ce81e8035868a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/168e2034-b360-496f-9955-8244afd41089/36893257770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bea55d86-3e03-401a-8623-2c294d2180be/kezobaxivageta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bedabc-0762-4bf8-b478-3ba9cabae195/95203986565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04fb305-23c9-4ffa-a75a-3284e88cc48f/59063790090.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8B 4688 bytes
SHA-256: f275fe8d890333054ddbfa3886ecaf5a8ecda2eb772fd4dfda5b9b714dbd8216
font_01_sfnt_off0000ab88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB88 10772 bytes
SHA-256: fbcc443108567bf2516814f7a67d84eab9a196caa8f5e6b36fedfe8b616fd6a8
font_02_sfnt_off0000d047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD047 16148 bytes
SHA-256: 43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7
font_03_sfnt_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c