Malicious PDF — malware analysis report

Static analysis result for SHA-256 afefc3d8052a7aa0…

MALICIOUS

PDF

44.9 KB Created: 2020-10-25 07:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d2ca8153a525f42e351f504bfc06c953 SHA-1: b9f506675ea47d6650669698f479d4268e9cc475 SHA-256: afefc3d8052a7aa0e27f54112078336c4a7ae11958062bcc60840e78b7ba6d0c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Oxford dictionary free pdf' and a URL that matches the malicious redirector. This suggests a phishing or scam attempt to redirect users to malicious content.

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=oxford+dictionary+free+pdf In PDF document text
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/solesa.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/f78fe920d5b776d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8703b82abe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f931bbe66695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_5f8caa7f74a04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8705b6c439b.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/1458682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f8d29eb4fe7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5f89f52427ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f877584211cf.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/f1bcb0c9-4d8a-4d49-ad60-5eb0dcd8961d/38320779478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7795234-b602-4bed-8f09-0ebdf87aeb44/stevenson_middle_school_bell_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bf4c7d7-44bb-430f-a679-66163735ca25/lei_de_kirchhoff_exerccios_resolvid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8e2477-cedd-40c3-9fed-9edad4ef8a5f/xusafosuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3f84b7-7816-4f83-adc1-a5467350cf6c/gederalidosedokituloda.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_off00006f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F82 5136 bytes
SHA-256: 0a8d2d2350ed9e1270ead21d4ce622260c5612bc31a92adcee673d12e804d88b
font_01_sfnt_off0000811b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811B 10996 bytes
SHA-256: 449c42dc0411ed54ec3aabd692a08f389462beaf25d57db0f20e43a9ba51d193

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