Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd89d84a11913f1e…

MALICIOUS

PDF

74.4 KB Created: 2021-01-04 16:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0963e24fa33fed87f549a5c1ebc88676 SHA-1: d5960d6b58015ce38a7e0a2b38c6538289d5e4ca SHA-256: cd89d84a11913f1ec9e1aa68c08816c0955f66ac62e876b90c6d8cbcbcfaa1d8
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=homtom+ht+7'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=homtom+ht+7 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409801/normal_5fbceeb10cd4c.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/b80ca2c0-b83b-4072-8014-d9dd775bb6e4/paper_wings_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75375e84-a1db-4169-94a2-210de1feb230/zombieland_saga_sakura_x_saki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f494b70-625d-4353-888d-7d6f330fcf3b/regaveborobiduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/584d30c8-1b25-4e1d-a4e6-c3ae70a593c3/new_inside_english_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123b74f8-cdb6-4d20-bb9d-23b04d59a350/kawowudinometoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef085e5-ff7b-4dfd-bd18-3d5a8b51de80/planescape_torment_walkthrough_no_commentary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb51bab-0551-4257-b093-a85cc5642496/59196105753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c0f1cd-1b3f-4ec6-a4d1-d1aab68cd989/vizio_e470i-a0_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f52a717-67ed-40ed-802b-e4aea0a66da6/the_sims_freeplay_online_generator_no_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/peanut_butter_jelly_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f58d03c-67df-4972-a023-e2b6c1b1e8ac/mise_en_scene_in_citizen_kane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c390a0a6-b034-4216-bd03-e16bab21bbde/ketarajadotajugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91dee571-a71a-4945-b866-f1a3b73f25e8/sekefenevodugekotarora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/426b0ebb-21f0-43ea-b8b5-e9ce4aa72556/garobifisux.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_off0000e812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE812 4448 bytes
SHA-256: 1ac1f9821d6054e0b4a83c97740bf08c2627322e948b930473900901cd60deac
font_01_sfnt_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 11384 bytes
SHA-256: 51c077fa18c15d04e4195d5b02e24be994d66a5479c3e01b53ac9f1ae46800d2

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