Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7b76603ef2b727…

MALICIOUS

PDF

73.2 KB Created: 2020-11-11 05:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c5ee61efc4293c0721b8726303e7d79 SHA-1: 7a8c56099738d12a80b3f1384e0a7be68e5b1e5f SHA-256: ec7b76603ef2b7276952fa25b691612cb9762192cfad4eca8c9b195e2ae2a9bb
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector pointing to 'ggtraff.ru'. Heuristics indicate the presence of a link farm and ClamAV detection confirms it as a phishing trojan. The ML classifier also strongly flagged this PDF as malicious, suggesting an attempt to direct users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?keyword=hamster+breeding+facts
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/6762618.pdf
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f8ff77c792d4.pdf
    • https://cdn-cms.f-static.net/uploads/4412773/normal_5f9cd14a37adb.pdf
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/budufu.pdf
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f8b4051163d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0b912287-ebc5-45d8-aab0-8874eca2316e/marathons_in_texas_january_2020.pdf
    • https://uploads.strikinglycdn.com/files/93844c6b-522c-4719-acb6-e48d65b97721/bose_soundsport_ios.pdf
    • https://s3.amazonaws.com/tugumeb/nulutaxepox.pdf
    • https://uploads.strikinglycdn.com/files/a6836ee5-c899-4196-9f9b-69189866c941/pokemon_go_map_tracker_nyc.pdf
    • https://uploads.strikinglycdn.com/files/ebedbe84-989a-456e-a1ce-1b2a03c17320/pemodiropizejitojoma.pdf
    • https://s3.amazonaws.com/jamokaroxoj/arreglos_multidimensionales_en_java.pdf
    • https://uploads.strikinglycdn.com/files/1c579739-860b-486c-804e-dc9a6085a5dc/97187496973.pdf
    • https://uploads.strikinglycdn.com/files/4a5849d8-286a-4772-b1b1-0207f9659a31/lijiliteso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d65c.bin
d627e6fc2edc12fec38f9ff56f4537332da0403c4d909c20937354c3a8cd0cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD65C 5408 bytes
font_01_sfnt_off0000e8a6.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 1800 bytes
font_02_sfnt_off0000f134.bin
f55608ffba81fb1c651253ee827347a71c1339aaccd5ae9e910f54a36712265f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 10960 bytes

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