Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8fbbc2ad9ed1b0…

MALICIOUS

PDF

203.5 KB Created: 2020-10-28 15:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1d78f00a6c0339b524b3a51cb627c215 SHA-1: 95dd83419e3d6a352b24412a4b2873f24f3dc9c5 SHA-256: 0f8fbbc2ad9ed1b0c0592575420551ff87eb746875e8faef8bcb1ae070cc8c44
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating a malicious redirector link. The embedded URL, https://ggtraff.ru/aws?keyword=oxidation+state+rules+youtube, is likely used to direct users to malicious content. The document body appears to be obfuscated or corrupted, but the presence of the malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 3

  • 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.
  • 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/aws?keyword=oxidation+state+rules+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f90734ed403a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f8ab218c9d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8a4207e11c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_5f95c7a03cb0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5f912ee5db86d.pdfIn PDF document text
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/15bb762e86b.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/wijelul_fovarofe_gomewidefo_tipoxomifirovo.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/e8239c1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazovugal/bncc_educao_infantil_2018_em.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851ffc08-34b5-4242-8051-1b11c9a9e05c/61854384863.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/43151190738.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/93583656295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49773aee-d4d1-4438-bcdb-3a9a57468dfc/65758308865.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/53748285267.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/caballo_de_troya_en.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f68f67c7-2cb3-474f-ac8f-467fd4f612d8/catalogo_truper_2018_el_salvador.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/the_great_panchatantra_tales.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/cleveland_high_school_nc_basketball.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/pejobapokidirowuxujagum.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/kujubipaveju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef05948-13c5-4dc8-a568-4f1227bc35d3/austin_moore_tradiesis_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/jululasi.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_off0002d51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D51E 5156 bytes
SHA-256: b5cc98af00476c93e528c8f95e0f57db84f42263ddc190abbdaaa9113f82555c
font_01_sfnt_off0002e6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6B6 22156 bytes
SHA-256: 493006443a06233b7d490b6fa5f5fa502141d0f609953547ac23fd75ec65139e

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