Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1045f7c19c0a376…

MALICIOUS

PDF

74.1 KB Created: 2020-12-22 00:23:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5e87050f19bb9fe0541a8e8196f6e849 SHA-1: c16adebefc24000406a8d21a84acc58aeaf47f20 SHA-256: e1045f7c19c0a3762ede9f31827898f13c2d910c2eb23eb7932e880416ccfb40
154 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=great+gatsby+chapter+6+questions'. This indicates the document's primary purpose is to lure the user to this malicious site. While no scripts were extracted, the presence of a malicious URL and the ML classifier's high confidence score strongly suggest a phishing or malware delivery attempt.

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://gettraff.ru/123?utm_term=great+gatsby+chapter+6+questions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5fa8aec87a128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402507/normal_5fd0499beda14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5fb3395d41491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495860/normal_5fc1e399b7ecd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f87d0e0e3528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5fbbc5f841535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ef262a-d7e0-453e-9111-1d030193a4aa/jerry_thomas_bartenders_guide_1862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1d40c8-4577-41ef-a2b6-4fb2be5e4564/annovi_reverberi_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2c2a0d-1dcc-4b69-8ee3-ca36672e9e39/78893249012.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce00863775b77c105ddd03/t/5fd6a476313c42342b97f399/1607902326882/mezixuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a33d1fd-61b3-4e15-b757-d8d1ab09db0f/sugoxaxirigasujopudatevef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe07733570fb44d1ca2fee/1606289272322/worlds_hardest_game_hacked_google_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e74009-846f-4bcc-8dbf-163b088f5bd3/52536899144.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77D 8236 bytes
SHA-256: 61d636ac1385ec37e349a0889ccccc8d98bd182b7f9e1a175c6b5b5d6f65ef02
font_01_sfnt_off0000e2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BF 5716 bytes
SHA-256: 65ed4df71a87b536ca8c06672947c185f8bf4456f8c469d3a32045956b93e537
font_02_sfnt_off0000f631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF631 11496 bytes
SHA-256: 4b7ea8e6a449ab9c243862d71cad0e68a9903a8417d28dfa6ad18a68cb621e68

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