Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebea21734c5bda4d…

MALICIOUS

PDF

42.8 KB Created: 2020-10-07 23:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8f77d390ba653e899232497351d0a098 SHA-1: 1514ecf55b78011b33034b61bfd1f2427139d226 SHA-256: ebea21734c5bda4d7b5352a54f947409eaea408efc3cff9ebc81705cb2fb4e62
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, also contains this URL and other benign-looking URLs, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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=earnings+per+share+questions+and+answers+pdf In PDF document text
    • http://pofoder.allrosesfarm.com/uploads/1/3/2/8/132814930/ed9cefe1bf34.pdfIn PDF document text
    • http://gamiv.liz-clare.shop/uploads/1/3/0/7/130739377/2219836.pdfIn PDF document text
    • https://site-1040434.mozfiles.com/files/1040434/xujalolerigirutadinakojuz.pdfIn PDF document text
    • https://site-1036805.mozfiles.com/files/1036805/85349906495.pdfIn PDF document text
    • https://site-1039127.mozfiles.com/files/1039127/jifoteravatedimile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/vocabulary_workshop_level_c_unit_12_vocabulary_in_context_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3694/1729/files/21090787178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3340/6883/files/mimulovavagafuxewoxud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/sonatobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807ae081-0a68-4553-89d2-10e7e7625a1d/kumev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df557d1c-28bd-4f5e-8d0b-4f6ee7f95107/39639056493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74aae865-d964-45de-91e6-9f6bd0c4632f/xudajireronulisuxegewasew.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_off00005f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F04 5448 bytes
SHA-256: 1a053cb943ffd25bfe86585f259a35512ec5da2d72e6e599eef76448631d53b7
font_01_sfnt_off00007198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 14604 bytes
SHA-256: 56d525b981ca615aacc76b71b62e1a2f1700c4c9335462ae3aa4bdd0d479f808