Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bfbba8be9da75f1…

MALICIOUS

PDF

74.2 KB Created: 2020-11-12 15:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1cb5855e766a15978d1a0b56ff7d8d34 SHA-1: 93b866e3ad5e0f0aa049da6b1ef06cfbd18b557b SHA-256: 8bfbba8be9da75f14d97403b08c934dd748298854c789b9aa0518e9beff7b7de
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ggtraff.ru, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to MP3 downloads, suggesting a lure for users seeking such content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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?utm_term=zaman+zaki+taji+qawwal+mp3+free+down In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5f8cc0a60d2ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5f8b4a7664ef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f90ba09babf2.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://uploads.strikinglycdn.com/files/fe0e8544-5659-4c68-b809-b3357350d108/divirodov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02c0ffc-69b7-4d2a-9491-fe385a1cc1a1/wixiderapebijoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c34ef34-2666-49dc-a2b4-c3f86e674120/polk_signa_s2_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562a5832-364d-426d-a62a-a1809fadb0eb/zovav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b4a0fc-2de7-4091-b613-c0857e38ad99/baremexokiwad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7df9b5-e2f3-4a7e-923d-3f0ad4cd9b28/lanuxiveruwolof.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/master_airbrush_g233_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70b22486-e460-408e-8185-33e86219655e/dropper_minecraft_server_1.15.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/articles_in_english_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fcc2e20-44ef-44b8-8893-b148c9c13f41/98110059440.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_off0000d57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57F 5324 bytes
SHA-256: e07f538b18a9c8c7920772705c21d947882ed2d36fdcbcb515118c867b70a397
font_01_sfnt_off0000e7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A0 11472 bytes
SHA-256: 51e23cce238bec86cd9747dc59145820f39956a345fc02868085365fb4389616
font_02_sfnt_off00010d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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