Malicious PDF — malware analysis report

Static analysis result for SHA-256 054b5de9f633d0ed…

MALICIOUS

PDF

50.1 KB Created: 2020-10-29 16:34:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 742d213b76e5075c90954b1e58686aee SHA-1: dc21f38341a857ece4c8dee210eb1b3fb6ae36e7 SHA-256: 054b5de9f633d0ed5c624cbe18c1b09ef062267d644315d7a0237225d26b4659
184 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://cctraff.ru/strik?keyword=thaumaturge+ffxiv+guide. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to distribute malware or conduct phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/strik?keyword=thaumaturge+ffxiv+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f882881594ec.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/5776259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f896733dffcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f875992cefcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f9149747cafb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403940/normal_5f95cbf7b4666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_5f9002c4c97c5.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/4826575.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/1905261.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/puzezowapijewaduk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f90f6fcf15ba.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/6978290.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/laradusa/guide_me_o_thou_great_jehovah_lyrics_and_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7673/0017/files/91392008888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5213/7128/files/tour_guide_script_in_manila.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EA 5188 bytes
SHA-256: e83f572e6993af4786a7ae4b7769c3518b9d4bc119efbde282f9815c4617c817
font_01_sfnt_off00008271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8271 10460 bytes
SHA-256: e106a8b1657aa386fb6cbbe669f8db1899ece8e1bac27ad7b83f9cd154c945d2
font_02_sfnt_off0000a626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA626 16160 bytes
SHA-256: 5446d8693f472ebe56539db1294e6b993809411a69d567c9d8907fa578c39aa0

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