Malicious PDF — malware analysis report

Static analysis result for SHA-256 518af4ff4ff1df4a…

MALICIOUS

PDF

189.0 KB Created: 2020-10-31 04:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 14c15f43f4a9f928179122e58ae70271 SHA-1: 17ba5350d9ce0cf7b24a82196c6c5b01a7f9a347 SHA-256: 518af4ff4ff1df4ae67ee469b776cf3313236c5a6b3175ba6dcadd63fddd285d
102 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/123?keyword=song+ids+roblox+nightcore'. The document body also contains this URL, suggesting it's the primary lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within a PDF often indicates an attempt to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.ru/123?keyword=song+ids+roblox+nightcore In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5f8ee8c517dc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f93fb0e1e951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f8741c3c7860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5f90853803222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f8aebffdc5b5.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/libowebujakux/algebra_consecutive_number_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e34fb1a-6b4b-46c0-95f8-33e337d58118/nixasagupuvefuwemesez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4804/3164/files/concepts_of_independence_inc_new_york.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/4574857646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8424/2325/files/vorisesaxuxivarogijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6b6f3e-0628-4311-8739-b7ead669be64/13420398607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/8305/1431/files/resumo_lusiadas_9o_ano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8694/7500/files/vojedajisutamapipasibes.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAFD 6676 bytes
SHA-256: cfef93ef1a9386f573262ba4d0c521a1e00c6f7c161407f73f62091bd797ec36
font_01_sfnt_off0001dba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBA2 39552 bytes
SHA-256: a3bec54c1577e4e6a8724c5ff63b1e495664827be4fcef1f19bd4a1635996094
font_02_sfnt_off0002569f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2569F 5300 bytes
SHA-256: 67a87f22e0021313779462a64ef8476b84d4070364306c9a54512913e2a5309b
font_03_sfnt_off0002689c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2689C 9808 bytes
SHA-256: 86ec94341152f3250589ac183129fd68f3cdcf504885594b3482e73bed25d71a
font_04_sfnt_off0002895b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2895B 14032 bytes
SHA-256: 1ee095812ac2e2aab0ea55c5284fa0e881463bdd1f7f3d7b4a3d8e18a710f862
font_05_sfnt_off0002b8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B8A0 18820 bytes
SHA-256: 26724c0c3effb455921aae74a2cc5286895f3e5545ac719fb4eeec07eb3b24e2
font_06_sfnt_off0002d5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D5B1 6092 bytes
SHA-256: d748fa1770b69bde41d0be8a979b83946aeeb1510496ad383e878bbebf8e0056

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