Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b2b79acd60e206…

MALICIOUS

PDF

40.4 KB Created: 2020-10-02 12:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: de2ae372b65c10f9aa1c56fd1dd5e977 SHA-1: f686ae266c58d6e5756d7e7de070a1808dcb91f5 SHA-256: e2b2b79acd60e206bd2fdeb6ceeb9f94e4d5c2ffe9a4770000eebb4b55cad761
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ggtraff.ru. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure the user to a potentially malicious site for phishing or malware delivery. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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=gun+rack+plans+free+standing In PDF document text
    • http://miwafew.marketingforimpact.com/uploads/1/3/2/3/132303338/9731926.pdfIn PDF document text
    • http://files.emittedenergy.com/uploads/1/3/2/7/132712483/biwetiwovuxafewowok.pdfIn PDF document text
    • http://wuwuw.mrreckling.com/uploads/1/3/1/4/131482916/1240709.pdfIn PDF document text
    • https://site-1038808.mozfiles.com/files/1038808/94423813778.pdfIn PDF document text
    • https://site-1039210.mozfiles.com/files/1039210/89247148269.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/1/0431/6728/5410/files/cognitive_load_theory_in_the_classroom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0511/6053/files/renakokamotuzaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3798/3388/files/short_wave_diathermy_indications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1403/7919/files/miroxuvuzomuforujavow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/car_swerving_lanes_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9996/6628/files/senior_awards_night_speech.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_off00005f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9C 5420 bytes
SHA-256: f277cfb2d938096dc1eb082e4f64abaedb136a49fc60545f96727f538bf2cabc
font_01_sfnt_off0000721e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721E 10300 bytes
SHA-256: 97a8115aa65d56c82d2b67b3eebd89ec6316277629f0b4c544b4d17f6b4c623f