Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a6f5e9d1915561…

MALICIOUS

PDF

35.2 KB Created: 2020-11-03 00:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 118546cd881beb30aedb83ed3297885e SHA-1: 6a416708b7b7b8a8288556439033d4e4985ea839 SHA-256: f0a6f5e9d1915561e3f89054d595b9218bf6daadebd9cfb2b3cc8994f52b4baa
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL https://ttraff.cc/123?keyword=the+physics+classroom+wave+speed+answer+key is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest an attempt to lure the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ttraff.cc/123?keyword=the+physics+classroom+wave+speed+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450430/normal_5fa08222dd94e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f9e283b6de0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_5f97beca01a60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f920e8915b2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403273/normal_5f9ff947552a8.pdfIn PDF document text
    • https://nirilixurem.weebly.com/uploads/1/3/4/4/134474770/sexavodezuxizon.pdfIn PDF document text
    • https://jolefopasovoja.weebly.com/uploads/1/3/4/4/134402584/024fda41fb3922c.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/704a63f3-83f2-4397-bd9b-9bf65c5bce77/1530259701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d495c6-4fe0-4a20-bc41-ed49d854f922/garrys_mod_unblocked_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b087655c-d22c-408f-9a32-9685cf7584ac/23935358180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d478309a-3311-453f-ad14-6633941bafd3/81436292010.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/brain_on_fire_livre_francais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6484470a-7cda-4bc5-b128-ad9926c586a1/37096661490.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/icde_2020_accepted_papers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd0a918-db40-4392-ae00-c8af74128f4c/8530742903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad366a84-a389-4861-a61f-9ab15998e25a/84439371659.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_off00004ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC8 5580 bytes
SHA-256: 53c271b8409184927a569b9dc46b1ad316002b8f216e7f539c97b3236ec3fd82
font_01_sfnt_off00005db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB2 9956 bytes
SHA-256: 212746496a4dbe0f2cd05e9f2c05bffae4df050360474032ecf92a8d8975fb00

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