Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6eae18616a435c7…

MALICIOUS

PDF

46.0 KB Created: 2020-10-27 18:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0efdf1175a0dff12635f8ccdc0a4112a SHA-1: d07857de59ef983e1a1a8873849339e3da7734b3 SHA-256: f6eae18616a435c7c6625945f41d5910751c663739bdac56ced980a01e2ea751
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/strik?keyword=parris+island+flooding In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f8f774e84282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f9481bbed3f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5f90dc1621ca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f9116d08afc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5f9066e5dabc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8c8bf066f97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f954c6c640aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_5f96f9a3f30bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_5f91e0eb67fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5f966c7474dce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f97367040b19.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/39a6b7a6-c1b4-4df2-916a-38e30d8155fb/69844305887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca73438c-f394-4226-b3cc-173add0158da/88963813897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5626ba-df1f-4f16-a8eb-556bddb322f0/98079818171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2739702f-c47d-4496-9349-125f928907b0/bukegebamoromuwot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14d328b-caf7-420c-b5e9-de724bd85be9/50039039670.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/ecg_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/rodejerib.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/sample_filled_passport_application_form_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/92278783195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/how_to_install_optifine_1.15.2_without_forge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3110/1603/files/dispositions_fiscales_2020_maroc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8527/6348/files/35721401496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5966/7359/files/64543287194.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000767a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767A 5076 bytes
SHA-256: a4a27700a5dd186b676e444851e6742056683a7256d06a1179e23b71fffb60f8
font_01_sfnt_off000087c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C5 10136 bytes
SHA-256: 059029faf9e8642fd0e3522fa80fc44b415b2c4d086edb810787f7994903cfc9

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