Malicious PDF — malware analysis report

Static analysis result for SHA-256 403d834813e2c620…

MALICIOUS

PDF

52.7 KB Created: 2020-10-30 19:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 307fc22b0efcf8da2021e8d153345977 SHA-1: 180482ca7deb6d72733fe5776590b813938044b2 SHA-256: 403d834813e2c620293706c9085d9075b431a24716408d0201c74935777479e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to distribute malicious content. One prominent link, 'https://ttraff.link/123?keyword=eu+labour+law+blog', is identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the overall structure points to an attempt to drive traffic to potentially harmful sites.

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.link/123?keyword=eu+labour+law+blog In PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/b5c6892cbb.pdfIn PDF document text
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/limibifubovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f987ec97b5c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f8d7180ac5f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_5f9234ec00218.pdfIn PDF document text
    • https://ruzunaxatan.weebly.com/uploads/1/3/4/3/134340268/suvunugamed.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/1/0268/8702/8926/files/vonuloxedegisizaselajeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18761a75-aca3-46d0-b324-daf24eb052e3/62530328052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/627c620e-c624-425a-b083-0f07b7486d93/wesipifopudololareke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/bexoronometozemoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/9468092910.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_off000090ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90AD 4864 bytes
SHA-256: 7c6e4b6d1fe22ece30f86eb1fa17c321e5fdf466025b02fd1de53292980abde5
font_01_sfnt_off0000a160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA160 10948 bytes
SHA-256: b7fd854981094d8266ce3e3d27cd2a3521130cf629c29e25d1148f2cb2c56f35

Open this report in the interactive analyzer, or submit your own file for analysis.