Malicious PDF — malware analysis report

Static analysis result for SHA-256 5056133a51f788e2…

MALICIOUS

PDF

47.8 KB Created: 2020-10-25 03:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c522844d01c4ca2a374a2f5021d36ba3 SHA-1: 087262a5c213f6521609c133268ed83125a4abb1 SHA-256: 5056133a51f788e22f3bdf813da8371a340fd5da544e052814952b95c631a72c
184 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to attract traffic. One prominent link, 'https://cctraff.ru/pify?keyword=raspberry+pi+remote+desktop+android', redirects to potentially malicious infrastructure. The document body, though heavily obfuscated, contains this same URL, suggesting an attempt to lure users 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://cctraff.ru/pify?keyword=raspberry+pi+remote+desktop+android In PDF document text
    • https://sigakoge.weebly.com/uploads/1/3/4/4/134437147/5950152.pdfIn PDF document text
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/1197797.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f8c0f57847b0.pdfIn PDF document text
    • https://sewobefavewekog.weebly.com/uploads/1/3/4/3/134367647/1542729.pdfIn PDF document text
    • https://fonaduwi.weebly.com/uploads/1/3/4/3/134366998/21f7c2bf5ab4.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/6271120.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/jexogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f882ea46ff38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5f8ace90a2ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f8dd7cf744a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f8ca555aa861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8a101567c89.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/ab37faea-fb55-481c-83b9-0a482bd8993c/5852394507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46b8fc6-60e5-4872-b993-4e717c320b0a/murone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895d485a-98f5-488b-aec2-ab5ad954b244/37565758715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbd6138-6933-46c1-a2ce-a3a67e2202de/majoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7e0b222-5a44-4338-896d-acb94325c07b/fosowuboruziso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0487/6727/files/apk_ytd_video_downloader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5051/files/23175779201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4807/3899/files/57594740233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5344/5020/files/authors_use_different_text_structures_to_answers.com.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBE 5172 bytes
SHA-256: 110c94d544a2fa3eaed0a52c898f415b4d17d0301144c3a4284a073f5d4778b6
font_01_sfnt_off0000803f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803F 10268 bytes
SHA-256: 49832ffa42113d0981e5e9f7b4aa958c2710abaf45bd4a53ef1d100dbdbfacfe
font_02_sfnt_off0000a361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA361 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230