Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8f6b7ddb9345e9…

MALICIOUS

PDF

62.1 KB Created: 2020-11-03 16:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c5d42849e087b28743ac740302fdd007 SHA-1: dca3d2b6f9b15d40c9efb8b997663f577af9aa1d SHA-256: 6e8f6b7ddb9345e9e39a799c69b1d5d11e10cd8bb7da5f17e0aca896f48b7ba3
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a music download, which is a common lure for phishing or malware delivery. The document body and embedded link structures indicate an attempt to drive traffic to the malicious URL. No scripts were extracted, but the PDF's structure and embedded links are sufficient to infer malicious intent.

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://cctraff.ru/strik?keyword=linkin+park+burn+it+down+mp3+download In PDF document text
    • https://wegupufula.weebly.com/uploads/1/3/0/8/130813429/sitamutodom.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/suwedevotomelasube.pdfIn PDF document text
    • https://jesakejijubew.weebly.com/uploads/1/3/4/5/134577011/410c5b4e.pdfIn PDF document text
    • https://vimefipivarek.weebly.com/uploads/1/3/4/3/134310944/ligevekiwasir-ludoxo-pupof.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/dimabanak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8958/9930/files/manual_osteopath_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/destiny_2_nightfall_ordeal_matchmaking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a224a065-e694-4b64-88f9-aec35a33061f/asking_questions_about_cultural_anthropology_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f813d76-6c2c-49c2-a535-f39e0f09040b/mumokukiriravilebirata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e983e45-1ed9-4e0f-8b5f-a5e7726b43ad/zasimopovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf2cb9e-119d-4dc2-bc30-6b9b79705f24/86580990157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66579921-8aae-46f0-88f5-5c6fede14c86/as_your_baby_grows_magazine.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000bcc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBCC7 26512 bytes
SHA-256: 3af94923da7f30927c7224ecbc8355a4826094bc01962a8bded2c8f63a93bfb7
font_00_sfnt_off000082be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BE 5328 bytes
SHA-256: d4455464b75b711d69727f46975dd3afe7a6ae02f87a3ce7fc0808dc7f2898a2
font_01_sfnt_off000094db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DB 11684 bytes
SHA-256: 222d0ffba085b52101bb26269c855e7cd18af29f7620827756462e27d6ff3bb0

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