Malicious PDF — malware analysis report

Static analysis result for SHA-256 539fd706e8fbcc54…

MALICIOUS

PDF

43.9 KB Created: 2020-10-17 07:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e9e9bb548ea50cac1ab16b3c8b0ab720 SHA-1: 336d13ba98eb9f29ae72e2e8655498247ed74e4b SHA-256: 539fd706e8fbcc544fa0556b44f558d09772daa18708421e9307ebc3d8759a15
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and contains a significant number of embedded links, many pointing to external PDFs. One of these links, https://gettraff.ru/strik?keyword=la+rivi%25C3%25A8re+%25C3%25A0+l%2527+envers+exploitation+p%25C3%25A9dagogique, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, potentially leading users to malicious 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://gettraff.ru/strik?keyword=la+rivi%25C3%25A8re+%25C3%25A0+l%2527+envers+exploitation+p%25C3%25A9dagogique In PDF document text
    • https://sevanilab.weebly.com/uploads/1/3/1/4/131437268/6940685.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.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/8878b03b-660a-4345-8321-269aadcff354/39975285906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca942ca5-038f-425c-8a79-6ae34663948a/8981166397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90792065-fe86-43a5-8910-a669331f5021/61400314935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4082fd00-766f-45ba-87dd-8aada4267967/fewajalibewavewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c82396-fa69-4fc1-bfda-b5f57b12b9cd/95241026681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9b4a55-8567-4e2c-8bf4-8b3878ab7f08/kubunogiridadumubiwojon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc76ea86-ce30-473d-bb1c-9b6e120242ee/zebusejabenajunuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f38a60-dd4c-48b3-87a9-4be5ba8670df/luvomikivowevir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7da8809-f6f3-41d3-8411-65e4f477f447/29906201485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a0368d-28f1-415c-bc5d-5de715c84449/tasegofafobasilabofixeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385f3a49-13c5-411d-aa80-b1b9b654d591/xawutoposo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17a3d81-a344-4fc4-8557-3322941b9fdb/tusakarewivaruto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4622/7096/files/95892297365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9439/6068/files/xituzejupijimamofawiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8380/7902/files/ocean_currents_map_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1431/4910/files/los_10_mandamientos_del_vago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3432/4387/files/namutuvaruronu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ed6c09-2d8b-4c1a-86fe-fd1e6eea0010/62673322987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ba0bbe-17cf-480e-9653-9452bb1347c7/33258321165.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_off00006722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6722 5876 bytes
SHA-256: 3574aaa8f6390b44f53f13a2421d4274f9ba4b1fb26568a848cb6888c7f7a3b7
font_01_sfnt_off00007a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A00 11864 bytes
SHA-256: 0ea47f14fabf051e11a0eb316f5167ade2aaceef6a557c52016d12456541b19a

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