Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cd4bb51a65621c…

MALICIOUS

PDF

85.0 KB Created: 2020-12-06 13:53:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: caf7bcbbd1aeb2f8f84a1770411b18a1 SHA-1: 9c087b264bbf2d2445c8b1b16ac32b3563be64aa SHA-256: 07cd4bb51a65621c5309bb7a1cbdb9d4bb84fe7fd14cc74803c51920ffe1db55
214 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 'https://gettraff.ru/123?utm_term=start+something+that+matters+quotes'. This indicates an attempt to lure users to malicious infrastructure. While the document body is heavily obfuscated and unreadable, the presence of this link and the ClamAV detection strongly suggest a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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/123?utm_term=start+something+that+matters+quotes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_5fa1ed1473939.pdfIn PDF document text
    • https://gukenesiwedik.weebly.com/uploads/1/3/4/7/134735424/rufibiludep-vuxawoniwuzej-ruxaroludu-jafowuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f92e1ae0da68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fd4145a8629dca78754/1606373332445/blank_slate_game_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545005fd-6076-4e67-825f-b3ee2e351e98/the_secret_telugu_ebook_free_downloa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8dc9bc-3655-4705-937a-0c2c9776824a/jomube.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/bewafai_video_song_mp4.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6beaecb936d6a06a4c2a9/t/5fc949b0bc5bae4634fb3a50/1607027121915/hockey_jersey_dresses.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c42727a199023ab4a3d3/t/5fc37a34f3de5e49b5d0b41b/1606646326378/14298072162.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11858e5c7695ca99cc683/t/5fc6714a2dd96f5918cb0f59/1606840651056/rexall_london_adelaide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89cf0a1-b535-420a-bca4-09f91a2913cc/need_for_speed_most_wanted_mods_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f1fe588-9e7e-4a76-8026-b33d674f087f/32810575820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e180163c-5696-455f-a380-f932a401df92/67023541142.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/21859096349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ced544-59f7-4095-8a23-9d6ddd0864ed/vekaxikowomevubizajuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329eb3b5-a15c-4d3e-a943-bc1b979c031a/24231789011.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_off00010f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F01 5296 bytes
SHA-256: e9fb772d6a1d0f55520ae405869c911f3e61e620f12feb66a5ca93e54d3443f3
font_01_sfnt_off000120d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D3 11432 bytes
SHA-256: 2b3b30a299ebcfcf61b26129411784c66bff0837b3454e1af86f837148fa4f68

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