Malicious PDF — malware analysis report

Static analysis result for SHA-256 4971b4b2efe782dc…

MALICIOUS

PDF

59.7 KB Created: 2020-11-13 01:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7943e1423aad8f74174b80e8f4d33841 SHA-1: 5753f8881cc2b8bfb46660ed4f28153a3313f203 SHA-256: 4971b4b2efe782dc1142bbcf5b8f3d5bf3168699b467daae3f133a2a772da4d2
154 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'. This URL is likely used to host phishing content or distribute further malware. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as Pdf.Phishing.Trojan. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=costco+twin+falls+pharmacy
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f8b08fe909a4.pdf
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/lovasibazor_mifafisavutoj_vadokez.pdf
    • https://cdn-cms.f-static.net/uploads/4390642/normal_5f995eb5bd15a.pdf
    • https://begaraga.weebly.com/uploads/1/3/4/6/134652864/torajax-lasunojepobate-zopenasufe-rabupob.pdf
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/e719af3a4ec.pdf
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f8b0289f3245.pdf
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/9a9b4bd8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a2eb5fbd-2fc9-4eab-be65-120b7f804034/vofadovewijewuv.pdf
    • https://uploads.strikinglycdn.com/files/ffc6cf3f-251c-4c5e-8138-b3d5f370d8e0/gujaxojo.pdf
    • https://uploads.strikinglycdn.com/files/0f322e0c-7289-452f-a2d0-bab3ff5e1656/42000409052.pdf
    • https://s3.amazonaws.com/venunamazozuzo/bijojopazijoxel.pdf
    • https://uploads.strikinglycdn.com/files/a434567c-e6b8-4b7d-9d0d-7d942feca176/50095602195.pdf
    • https://uploads.strikinglycdn.com/files/cfda56f4-f1f5-4dce-a1c0-081e6bc1dfea/dileji.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_off0000ae53.bin
37ebc359ff719ff42f7948538733361a1b5d94a2e1ec262119d9a37874b40f98
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE53 5356 bytes
font_01_sfnt_off0000c078.bin
8936b26d752f57bb030b14d7186a309e447aa103e4da213c43c033628008ee4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC078 10020 bytes