Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee213f84f15b45b…

MALICIOUS

PDF

86.4 KB Created: 2020-11-04 02:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 382ddb9b7b054c07d6af8185a28e2660 SHA-1: 1d52fe0a0e5a183ae5b8e3c2a2ebd01ab92fc8c6 SHA-256: 7ee213f84f15b45b20b5823621c4a5727941b19bad7cf9e6f472846a68fd1024
184 Risk Score

Malware Insights

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

This PDF file functions as a link farm, containing numerous links to external websites. One of these links, https://ttraff.ru/123?keyword=diablo+3+leveling+guide+monk, is identified as a malicious redirector. The document's structure and the presence of many links suggest an attempt to manipulate search engine rankings or direct users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=diablo+3+leveling+guide+monk In PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/7651809.pdfIn PDF document text
    • https://vudepupebowazuk.weebly.com/uploads/1/3/4/4/134472779/pasis-gejajojebafe-fafomo.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/5e61d.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://foruvojupizife.weebly.com/uploads/1/3/4/3/134352799/novakidom.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/7099023.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/jakajivarekabifiw.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/d06714f0-8f3c-4eb5-9a3c-01488c601c86/77168208088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7d3f00f-f0ce-4156-b825-51d25b077d8e/totex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b409c9b-928f-4162-917f-9be6eca12360/sujitixamujikadopizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64922fce-dc0b-4651-b812-ef27fb1795b5/gunagozamatavavewuburapi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB40 5296 bytes
SHA-256: e61e74ea7f43ac784d983e0bd749b0a249ce18d34af1b5704e6c0b6b3ca5e242
font_01_sfnt_off00010d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D43 12668 bytes
SHA-256: 6d0a8a1288f1f54a304258ab007f22d2110b06f0e8376750fdabb3338a9f75ec
font_02_sfnt_off00013782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13782 16124 bytes
SHA-256: 9bd12ce09dd369d50b0d24b39bd4953c5d575f0ce4918378dacb3f0e120e25fe

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