Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d3002495e0e072…

MALICIOUS

PDF

51.7 KB Created: 2020-10-31 08:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ae743312419c51ebcc62f72cfe974729 SHA-1: c6e92937e259d7aaeb7b6f89310c8ba8d8f59269 SHA-256: d6d3002495e0e072050998eff93b95f53d27849b2a6b72256de14a28101e41ca
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a significant portion of which point to a link farm designed to redirect users to potentially malicious content. The primary malicious URL identified is "https://ttraff.club/123?keyword=separation+and+qualitative+determination+of+cations+and+anions+answers". The document body, though partially obfuscated, also contains this URL, suggesting an attempt to lure users into clicking through to external sites. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirector and link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.club/123?keyword=separation+and+qualitative+determination+of+cations+and+anions+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_5f9cfa2d4d911.pdfIn PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/jogivad.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/49dff3858553f96.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/tobobowu/hunger_games_finnick_prostitution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fd93d8-8718-4156-9ff0-bbddd35a8e4a/sogokutapexaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba92b025-2758-4a7b-b9d9-1957b0544923/vimenizokanedegopujix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44680490-0042-49c3-8baf-afa3e2b733ef/12708091448.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/11352370264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cde611d-e8ca-4bf2-8cbf-0c211006c11f/13489117141.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/fazeligukimegasepuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20baa1b3-0517-4bb3-841b-46a5f1667f9e/zodaboxusuj.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/sosodometakosuvuzujebuw.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_off00007f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F64 5684 bytes
SHA-256: 08421f94282699b9777cb16ce7d922ee8a8ce76bc2ce1ca440a262e6c42a429c
font_01_sfnt_off000092c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C1 17524 bytes
SHA-256: 074156fa8befc2265de5a3c503e7e0de2f36c0fc5eb21f947cb29dcc3b3693bb

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