Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e1b7258b7df548…

MALICIOUS

PDF

50.2 KB Created: 2020-11-03 14:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8584d4bc8bf6c8d3ac678fe2cdff918a SHA-1: e96578b015e9c95492198494d3e7df781bbcf376 SHA-256: 16e1b7258b7df548ac02e08a20679f77fb113d475d8b6bbee1551e57f2d4004e
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body also contains the same malicious URL, suggesting an attempt to lure the user to a potentially harmful site. The presence of numerous links to external PDFs indicates a link farm strategy, likely for SEO manipulation or to distribute further 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=stroker+kit+for+5.3+ls In PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/juwuzefusigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5f9e773234147.pdfIn PDF document text
    • https://kosonajiwepojig.weebly.com/uploads/1/3/4/3/134373389/jesixegitap.pdfIn PDF document text
    • https://kefanizitadibuz.weebly.com/uploads/1/3/4/3/134328212/5558172.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/toregubefi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d7a1af-2cce-4bdd-a2fc-e11a51860ebb/93578372483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0868b3be-490b-465b-a7c5-49d82876201f/bodenamabeliwasubif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08edd76d-926b-421f-a635-d5baa4e5c028/29874804761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e060b85-b32e-4527-bb7f-495c5a0bfdf6/wewepunazufowebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9f2b2a-308d-457c-a0af-4b5edd2e476a/mazda_mx-5_miata_haynes_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23073b3a-9425-4abf-b8a9-92099c832f26/29503735576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c5fbe1-b9f4-440b-8347-9c12a50eddd6/kirivazanuxaxawezupatetik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f028e8f6-6552-46f1-a91d-97f1a4f421cb/sexetenuditu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5123b9-aa42-4163-9eea-3f957ec409b5/jabotinutov.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_off00008683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8683 5040 bytes
SHA-256: 775b47eab3c53d873c6475aa09b781be1617c632a16fa259fcdfb741cb85a857
font_01_sfnt_off000097c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C8 10580 bytes
SHA-256: 54a8b01eee5c382837b9078d149b2db406781e29f14c5af3f28f0e4fedf16ff1

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