Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedb215992b99300…

MALICIOUS

PDF

39.6 KB Created: 2020-11-08 10:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b6e444180e760f4209f2bd0ebe1d2f06 SHA-1: 71c4139167be4cd28dd05fc6795488724aada01f SHA-256: aedb215992b993002d5607ff91fa698e6d86734769862c12fa2b6d26fcd54780
126 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to manipulate search engine results. The embedded URL 'https://traffnew.ru/123?keyword=the+kane+chronicles+book+1+pdf+weebly' and the numerous Weebly links indicate a traffic-driving scheme. While no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly suggest malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?keyword=the+kane+chronicles+book+1+pdf+weebly PDF link annotation
    • https://tilafiranude.weebly.com/uploads/1/3/4/3/134314128/pujoj_terujotu_fulel_tazazurupuloki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_5fa53297e11e1.pdfIn PDF document text
    • https://nubipejima.weebly.com/uploads/1/3/4/4/134480583/4908708.pdfIn PDF document text
    • https://mesumubanok.weebly.com/uploads/1/3/4/5/134507600/30601.pdfIn PDF document text
    • https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/kebawuzewe.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/nitikaxub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5f8ea498bc0a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450418/normal_5fa33c9b00eb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5f962c4934dcf.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/tetazino/lamupilugawerifofijoxido.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/hand_warmer_lab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27686ce9-93d1-4118-aba0-1bff137001d9/66396281129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0130c653-eb70-4709-aa96-dc7a5e604161/57735929829.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_off000059e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E2 5644 bytes
SHA-256: d364f27d1a3354f50d5d9b59857b9fcf8ae7da9a498bb76992218a74367fbf7f
font_01_sfnt_off00006d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D20 10136 bytes
SHA-256: b4f13e3ce01c1275ae9799f1f04113d676d03e7098913c20fb08ba634b78f0a3

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