Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b0938a2264f888…

MALICIOUS

PDF

60.1 KB Created: 2020-10-28 10:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab06241415dbcfab077c8dacb6522238 SHA-1: 9c2158ac3e795a672d980600a9dc7be4a12ea1f6 SHA-256: f3b0938a2264f888e10698fffe43d6da6b48bab4a6a3dafeeedbbe8f034b53e5
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the ML_NYX_PDF_MALICIOUS flag. The embedded URL, 'https://ggtraff.ru/strik?keyword=operations+management+12th+edition+pdf', is the primary indicator of malicious activity. The document body, though heavily obfuscated, contains text suggesting a lure related to a textbook download.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/strik?keyword=operations+management+12th+edition+pdf
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f889aa4b14f0.pdf
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f88c55919bdc.pdf
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/nikojadi-wutivuzopajif-tagovak-naran.pdf
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/80775bc.pdf
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/ganoxumul-nufubawadolifi-zawabidi.pdf
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f89585939f88.pdf
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f91f552e5cba.pdf
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8890ef2ca91.pdf
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f947888ce1bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b1608241-59cb-4f15-9766-2c8c4a7931d0/fazezobor.pdf
    • https://uploads.strikinglycdn.com/files/057697f5-90b2-43f5-8a5d-56f66ab034bc/38125666592.pdf
    • https://uploads.strikinglycdn.com/files/d34b940f-9747-4d3e-a593-5a26244f56e9/44273658091.pdf
    • https://cdn.shopify.com/s/files/1/0499/3548/3038/files/american_history_1_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0482/1572/0093/files/snow_veil_sanctum_claw_id.pdf
    • https://cdn.shopify.com/s/files/1/0483/5947/3312/files/19449862896.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/dicionario_ingles_offline_apk.pdf
    • https://s3.amazonaws.com/wilugugo/42632854543.pdf
    • https://s3.amazonaws.com/mupukesunobaga/bcs_preparation_book_download.pdf
    • https://s3.amazonaws.com/gavexilatuvitaz/algorithme_cours_ofppt_tdi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab0b.bin
7934d46ce5f1dad35d110ba93a18b5fa5f5da5a32a46c3d6f3bfa2c81aff32e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0B 5632 bytes
font_01_sfnt_off0000be04.bin
72625f36a5fd80af0cebfc39351c9eed25dd9d9d6dd8676277a1405d1be64d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE04 11004 bytes