Malicious PDF — malware analysis report

Static analysis result for SHA-256 515151490a1f9526…

MALICIOUS

PDF

67.7 KB Created: 2020-12-03 16:29:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88c216690d627ae6e11dc628ed062fa7 SHA-1: 613174f7d97467ac967ec75de0cecdad4c60f4b8 SHA-256: 515151490a1f9526bc36ff55815020780a0c6c1d3691c197cdaa76246826efc4
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/aws?utm_term=dark+souls+1+catacombs+guide'. This URL is likely used to lure users into visiting a malicious site under the guise of providing a game guide. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=dark+souls+1+catacombs+guide
    • https://cdn-cms.f-static.net/uploads/4467325/normal_5fbebef288965.pdf
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5f8d9e20bdce8.pdf
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5f9b58c7d42bb.pdf
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/2a205.pdf
    • https://nitetemefugek.weebly.com/uploads/1/3/4/7/134772401/bisusim-bulejamumino-sixame-wakopatasotud.pdf
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fc1293ab63c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc653a7cd1e280355f935b8/t/5fc8e9ef811c54250ee20cf1/1607002608579/birthday_cake_images_manisha.pdf
    • https://static1.squarespace.com/static/5fc0ca7740f1034a5ca83b63/t/5fc16801145a8629dce5ab6a/1606510594019/66538117994.pdf
    • https://uploads.strikinglycdn.com/files/754c807e-dd1e-444d-a56e-37f05f2bd193/jemokasesanofavapoforedab.pdf
    • https://uploads.strikinglycdn.com/files/f07cb9d3-6d2e-442a-b846-7b699f794165/wilixuwakudunatirugurowu.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6cd9e6d49a06bb8a86d4/1606380762056/forsyth_county_rod_online.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_off0000ccfa.bin
8a9e9538344a2d5ad2a91dfefd6b0f59d9b7a871c273aafcee43371de67ef20c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFA 5512 bytes
font_01_sfnt_off0000dfab.bin
a497cc2b3ed48228dae21334aabd4bb92535a087c7fbe9523abcf5231cda36b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 10220 bytes