Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ec9908fa3adeaa…

MALICIOUS

PDF

40.3 KB Created: 2020-11-03 03:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 848bd7c5f0c405d38790acd31ff5e733 SHA-1: bd6cde4b7ef2451efc95c684376083d30bbd5343 SHA-256: 47ec9908fa3adeaa0425ec84bde08fad4cb884809d9f68bee96532bcb19c66cf
94 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://cctraff.ru/123?keyword=sound+worksheet+answers'. An ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a harmful site, likely for 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://cctraff.ru/123?keyword=sound+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5f9ea70c4422c.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/xuxifuzituwu/87207080364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a063bc-2e9d-4621-aace-2f1ac45422ca/le_dernier_jour_d_un_condamne_a_mort.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef4c40da-1264-4bf9-b681-b8d7888bb64c/lalabut.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/27615926649.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/allegra_d_24h_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/46494497822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44bdd14-c0c9-4d46-8214-2f41bed4766f/5031177991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5749fd09-5eb2-47a0-818c-55f962432e1a/40527605844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a96cc0d-efa9-499b-83d6-435042814fdd/conclusion_de_seleccion_de_personal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37d639e-a26e-4e63-8ba2-9d58f183e016/niramazapog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a980b5a-4f49-45d4-9ca5-bc033be0174f/17090310400.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/xoxexadurer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2d1baa-9e5f-4e2f-837d-1c89a93081ae/57131669941.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_off00005f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8D 5140 bytes
SHA-256: 7d08d6baafdcb435981f5c3b9db8c78a23f4728678e2e2a1135abc3e2430d4e6
font_01_sfnt_off00007114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7114 10412 bytes
SHA-256: ab13558aa3a35340a6e6c81f2365254681bf93efbe76d40489684af8a18a4021

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