Malicious PDF — malware analysis report

Static analysis result for SHA-256 492e7d099832f8fa…

MALICIOUS

PDF

44.3 KB Created: 2020-11-03 13:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22716d6060e432628317bb1a1114a4eb SHA-1: 5387e78e92af148d7e567e062fdac88eda17cad4 SHA-256: 492e7d099832f8fa36ad74cbe587d4fcb8cdd0bcf490aeccd2d381ec381716b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains numerous links, many of which point to a link farm designed to host other PDFs. One of the primary links, https://ttraff.club/123?keyword=amsco+apush+chapter+9+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://ttraff.club/123?keyword=amsco+apush+chapter+9+pdf
    • https://patewolenapew.weebly.com/uploads/1/3/4/5/134525441/e98c595efe8d.pdf
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/lodifixulixo_kemavinikudase.pdf
    • https://cdn-cms.f-static.net/uploads/4379500/normal_5f948a0e92867.pdf
    • https://mowoxesabed.weebly.com/uploads/1/3/4/5/134594013/aa581f026b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/86d07471-3f05-4bc0-adaa-08400cdfb527/moler.pdf
    • https://uploads.strikinglycdn.com/files/6105c51b-8985-4e4e-86d9-115f7525db1b/95636313945.pdf
    • https://uploads.strikinglycdn.com/files/ce60a607-048d-4597-b1b2-be6b22688b22/lazomomabivevubuderugejem.pdf
    • https://uploads.strikinglycdn.com/files/13367d72-854b-4823-9fb9-edc428ca6ca8/53673539561.pdf
    • https://uploads.strikinglycdn.com/files/9d19f78c-c078-42b1-868f-21265e2342fb/72885749867.pdf
    • https://uploads.strikinglycdn.com/files/2b19c61d-3434-4766-a8d2-03f5364ce1a5/towles_new_tech.pdf
    • https://uploads.strikinglycdn.com/files/71f12d91-0511-4c24-b9f4-e52a84fa625f/zewugapowofapigetojabu.pdf
    • https://uploads.strikinglycdn.com/files/a6316bb6-a251-4e26-9665-18d82f951030/download_windows_migration_assistant.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060de.bin
349191f9ffb1502cf7900979fcedf4ba138c30c929953bdedbc721a0da31568e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 5236 bytes
font_01_sfnt_off000072a7.bin
9823a4cde69f19068171ba230d044e9cb9a232c9ddfb9767aaa80d4036847b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A7 10568 bytes
font_02_sfnt_off00009694.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9694 4324 bytes

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