Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ff5e60a201948d…

MALICIOUS

PDF

46.4 KB Created: 2020-10-27 08:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6180e7e18e6197fc4577d5b9af7a8ce3 SHA-1: dad819f804e9391fb9d5cffafebe07f7597ac339 SHA-256: 70ff5e60a201948db197ba8e7ea46c3c1226919432502ceeb3f4ff5799c95716
184 Risk Score

Malware Insights

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

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 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=social+security+office+austin+tx+address In PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/kevuk-gafezizejena-selifatajokob.pdfIn PDF document text
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/deviwokenel.pdfIn PDF document text
    • https://munerotilaxamo.weebly.com/uploads/1/3/4/4/134476206/ziragus-kuruwipumi.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/2478865.pdfIn PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/kusevuk.pdfIn PDF document text
    • https://xuzowezawejinat.weebly.com/uploads/1/3/4/3/134378303/gunitegokinuba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/dutitarepi.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/canon_eos_5d_mark_iv_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d32913d3-ea57-4209-8205-83ca1a6a15c8/tizarubaponudetotawotux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06652593-e6a4-44a6-8491-4af3d7b2e29f/vojofiregaket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62cdff8-92a2-4473-90fb-b85b8a7de1e2/thanos_demands_your_silence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df8ef32-b122-40ab-b67d-b44e9492fb3a/38440370540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45a7fea-9236-4ad2-b28e-b3d11c0dc349/divinity_original_sin_romance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e810900-665e-476d-8966-935c5e4edd01/refrigeration_hardware_supply_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4430cba8-d16a-4fb6-aca0-6bd8a939089a/31570354999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7f9fc0-4038-4703-bfa0-78122b45aede/49097458701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06562af5-e72c-439d-a809-0d87992da8af/lowom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1177/3888/files/mercedes_m119_manual_transmission.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8366/8903/files/conjugaison_verbes_espagnol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/molepibizikuse.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000678a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678A 5172 bytes
SHA-256: f8849aae13e5b4906adf96e7064a03491c214f9d96e557de89113d1358b30038
font_01_sfnt_off00007927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7927 11012 bytes
SHA-256: 8a8fd67ac4e3eb0a3f1b0872eaf4ea0295862d3ac3bbde94e754c885a9f7902e
font_02_sfnt_off00009e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E34 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176