Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7afe068e7a2747…

MALICIOUS

PDF

67.2 KB Created: 2020-11-09 18:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dc94988da189a1849e02ef0ee6292ea SHA-1: 75b46a612b43dcfd36ccb7180837636ed5919214 SHA-256: 4e7afe068e7a2747243e4e8f6f32e42f1326e024aaae3ca1711b710f1fa7e81b
162 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'. Additionally, a machine learning classifier flagged the PDF with high confidence, and ClamAV detected it as a phishing trojan. The presence of a visual download button further supports a phishing or social engineering attack. No scripts were extracted, but the primary IOC is the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?keyword=yes+movies+app+download
    • https://cdn-cms.f-static.net/uploads/4386363/normal_5f9c55263a164.pdf
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f9dca7ae7a52.pdf
    • https://cdn-cms.f-static.net/uploads/4379032/normal_5f9929ef702af.pdf
    • https://cdn-cms.f-static.net/uploads/4445729/normal_5f9fbacd29fb5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fifomi/juzalomem.pdf
    • https://s3.amazonaws.com/gifojuxaxeva/40855069951.pdf
    • https://uploads.strikinglycdn.com/files/9f855bda-318b-4f1c-a5c0-349fafbca653/72486346410.pdf
    • https://s3.amazonaws.com/dibedamoka/relaxeketegeradi.pdf
    • https://s3.amazonaws.com/rujimidujek/vestavia_hills_board_of_education_employment.pdf
    • https://s3.amazonaws.com/jikopot/hindi_nursery_rhymes_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/22f41980-d198-4fbc-9d7d-71819d50fce9/sowebajalujuzusokot.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_off0000cb5f.bin
150c96350d4d5ec804394245f992a10a951dcfb8265bbaf0ac6a9844c1ff5426
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5F 5124 bytes
font_01_sfnt_off0000dcd1.bin
699423e6628c0d22ff781bf1e8103d618f3a56830a4cd7f9bbaa104e03049691
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 10360 bytes