Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18317cfc5c64d04…

MALICIOUS

PDF

79.6 KB Created: 2021-01-14 04:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6b05c179c4fa41df20a56e56f1d39dc4 SHA-1: eb6f2226233db996dafb9e71a7742b2a91660ffa SHA-256: d18317cfc5c64d04bf1ed7d109d0bc2e70008807dd1ce9cefe47dd7907312e6c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malware. The document body appears to be malformed or obfuscated, preventing a more detailed analysis of its content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=hogwarts%253A+an+incomplete+and+unreliable+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5f98e4fb94e57.pdfIn PDF document text
    • https://site-1173730.mozfiles.com/files/1173730/mr_stacky_smart_farm.pdfIn PDF document text
    • https://site-1177644.mozfiles.com/files/1177644/bisijasa.pdfIn PDF document text
    • https://site-1177298.mozfiles.com/files/1177298/simiziri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5fceb53a0b424.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nisoxow/remoriged.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/servo_motor_arduino_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/bandhan_bhojpuri_mp4_song.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/88866050311.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/age_of_empires_3_android_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/witevewam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31E 5636 bytes
SHA-256: 90688430e2bb0ec524e9f77f400cc3ffc0e28cba76c76b304b184295b59befb9
font_01_sfnt_off0000e638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE638 1796 bytes
SHA-256: cd531a2e8ec44777b4655b602a3b12535da548c2661552636ce0fcc9d5fad1f2
font_02_sfnt_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 12844 bytes
SHA-256: 218788fe998bf07593b429c52ebb310e0f790bf9ada5cedac1096408135609ab
font_03_sfnt_off000118e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E4 17024 bytes
SHA-256: 5e362f3805a9a2a36c7ead3f04a0aad36752a5ddff511d5359d5b15b4b69c3d3

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