Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efece404eb3ae34…

MALICIOUS

PDF

131.8 KB Created: 2020-10-30 21:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c2c68c0078e51e708640361acdfde98a SHA-1: 197b1785bb2d771378a0d0ada6d5b91e8a5e08c3 SHA-256: 9efece404eb3ae3488a93b825ffd2c2abaa5be4f86480657a12351c0a13c082d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm. One of the primary links, 'https://ttraff.cc/123?keyword=fastest+2+mile+time+in+middle+school', is flagged as a malicious redirector. While no scripts were directly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to redirect the user to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/123?keyword=fastest+2+mile+time+in+middle+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5f9bb5281d2e2.pdfIn PDF document text
    • https://rubazepenomul.weebly.com/uploads/1/3/4/3/134324915/voketa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5f95224d74272.pdfIn PDF document text
    • https://juliraviwuziw.weebly.com/uploads/1/3/4/2/134267057/moxobotojo.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/6c57e21c-5c77-4507-a68d-cab11f01e0ea/35448295806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64edc4a-c59d-40cf-9f5c-ce58f6b4e76e/pukak.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/kififesanovefikesutupuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308aa01d-74b8-47b9-b5ac-701352d6d478/shadowcraft_mage_3._5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d251e1e2-b8e1-42e4-87f3-1460564d07e7/49264911487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ed04e9-dc59-4952-8b97-aca8d14ebef0/sebunirurukegaxusububes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8269/7889/files/geometry_parallel_lines_proofs_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192f3a8b-f8e9-444e-80cd-106096accf95/the_first_spongebob_episode_ever_mad.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A35B 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0001ad9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD9F 5172 bytes
SHA-256: e24ada00ec9a19726d228758b3eb0826a6370fe3fc2b6fc49b172cf9ed835f4c
font_02_sfnt_off0001bf0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF0E 13356 bytes
SHA-256: ccdcfdd0b41e280ff8605c7c9b5299d476c0c634bcbad6e8935aba5669b07a5f
font_03_sfnt_off0001eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB4B 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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