Malicious PDF — malware analysis report

Static analysis result for SHA-256 af381506ec1a5e91…

MALICIOUS

PDF

75.1 KB Created: 2020-12-27 02:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e057bc17f0c68252cbcd295843e700bc SHA-1: 2a9b45bfc83db3e33785576ae7294e6c3cf17a8b SHA-256: af381506ec1a5e91a1a95a8056a41438260cc9cdbaba29f4f55149c04ef7993e
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 'https://cctraff.ru/aws?utm_term=chrome+store+android+emulator'. This indicates the document is designed to redirect users to a potentially harmful site. 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 0.9998

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://cctraff.ru/aws?utm_term=chrome+store+android+emulator In PDF document text
    • https://cdn.sqhk.co/linigurep/n9LAJhf/jjo_sonic_boom_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5fb2f7559b4f6.pdfIn PDF document text
    • https://cdn.sqhk.co/deguxikezu/fig4igE/xekigoloruzelowixanujog.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/setigafat/50310357619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16f0125-e5d2-49b4-be11-16b675443c5b/17877526878.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/be_more_chill_michael_jacket.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/alif_novel_episode_11_and_12_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/worksheet_converting_repeating_decimals_to_fractions.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/95782023589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abb58719-2c9b-41cb-a5de-3837e2024fa8/retuvuxotixajupevoto.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/types_of_dry_fruits_with_images_and_names.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/castellan_fisico_quimica.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F3 4972 bytes
SHA-256: 9cb59ad2770a32937a25455c592fce6450b4296867961e9afd3342c64c29d8ee
font_01_sfnt_off0000faa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 10912 bytes
SHA-256: f196eed13e50117ed41ac2bc13eed6ce2e1b373f802dce5f194774f078c89d46

Open this report in the interactive analyzer, or submit your own file for analysis.