Malicious PDF — malware analysis report

Static analysis result for SHA-256 447031fa7abf3436…

MALICIOUS

PDF

39.8 KB Created: 2020-10-28 05:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aac396ea6dd2506871118c37f89752ff SHA-1: e6cb9a410c80eeb8d7ed651a8536d0836ee1cd21 SHA-256: 447031fa7abf3436e07e6ecae6460540daecf39effaefe1301255498a1f608f5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt, likely to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://gettraff.ru/strik?keyword=i+need+a+lover+pat+benatar In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5f95fd53e36b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f87e464b12a4.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/968470.pdfIn PDF document text
    • https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/wunadagoxe.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/0dbd067e.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/zelufigav.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/8311384.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/5879865.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/2935331.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/kaven_lidotobin_robisud_tepefobinijowaf.pdfIn PDF document text
    • https://gozarijaleb.weebly.com/uploads/1/3/4/3/134337750/d82a38e2513bc4.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/1161639.pdfIn PDF document text
    • https://genifefesabido.weebly.com/uploads/1/3/3/9/133999330/mitilobolo.pdfIn PDF document text
    • https://jokepalebaja.weebly.com/uploads/1/3/4/3/134360350/kekofaxijixixibix.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/geradi/jemima.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/5th_grade_math_minutes_creative_teaching_press.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/femefegapokakoge.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/28661218245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58151e63-e140-455f-be94-b2c0d60b1366/89879940702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609691aa-6499-4d2a-b878-0232071bd8fc/kisufugitamagafajagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080e0b97-d769-4ae0-b615-d1ac91fc5c10/222468385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d96f2c-b202-4cdb-8b1b-245fea2d2533/nowomanodaveweju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac9bbcc-9301-4eae-97df-10edc4ad2d9e/7665621124.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_off00005d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4B 4912 bytes
SHA-256: 7bb43b97525ab55f6de457260eb85b8c6145be4503624abd3141c4c45c62fe5b
font_01_sfnt_off00006e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E05 10300 bytes
SHA-256: 1d88876257387cc8d31a54d667f52e538cd6b824c6d256dcfe26931e178e7c6a

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