Malicious PDF — malware analysis report

Static analysis result for SHA-256 47472e15a8d13645…

MALICIOUS

PDF

68.4 KB Created: 2020-10-06 21:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b681f54f61d9fedbc52ed2aa83e01bb2 SHA-1: e58c4d54a381b9bc0d6e61637a805f0e4cb4b4ee SHA-256: 47472e15a8d136456c42400ccbee21c0465af12a7df35f7691271e7c956fb23b
124 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://cctraff.ru/strik?keyword=karnataka+akrama+sakrama+application+form'. The document body, though heavily obfuscated, contains references to this URL and other benign-looking URLs hosted on strikinglycdn.com, suggesting a link farm or redirection strategy. The ML classifier also flagged this PDF as malicious with high confidence.

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 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://cctraff.ru/strik?keyword=karnataka+akrama+sakrama+application+form In PDF document text
    • http://files.dallaspatioguy.com/uploads/1/3/1/3/131379732/leluwowinogivu.pdfIn PDF document text
    • http://files.styleatplay.com/uploads/1/3/0/8/130814200/7019565.pdfIn PDF document text
    • http://files.achieveprovideo.com/uploads/1/3/0/7/130776268/72ab8617a622.pdfIn PDF document text
    • http://gomiritak.srm2020.org/uploads/1/3/1/1/131163776/4603878.pdfIn PDF document text
    • http://files.impactuga.com/uploads/1/3/0/9/130969428/mufofavapo-kefumajel.pdfIn PDF document text
    • http://files.blinkofaneyehealing.com/uploads/1/3/0/7/130738641/5218771.pdfIn PDF document text
    • http://vutet.blunardsequipment.com/uploads/1/3/1/3/131383652/tinudumewajiti.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/ccabe9d4-ca19-4522-92f7-5d1c9d303c07/60686830336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c18b515-57c5-43cd-aa7b-5b896fcac89f/babenivenomipag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8385c138-62ba-4bd2-8c1a-a3cc1c204494/kajajoteteduzoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d17d4c2-614f-4160-baa4-2b0abcf37809/33858993287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c407610-a0ac-4ec1-a40a-4897d5520471/51717256830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa8c671-9c7e-49bf-9c7f-bd949af340dd/newifodukisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c373f676-7936-4edd-8f1d-2813601fcb65/mojolerofek.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000caef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCAEF 6980 bytes
SHA-256: a75e7e44ff390527ced8771d70af667e75ce4d8afd9fc4dd7eb12afa18e4bd5d
font_00_sfnt_off0000af5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF5C 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off0000b956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB956 5192 bytes
SHA-256: 866e695473d230cbb73eda6717e799f3155d57d6f92068dc0c294391ea7b784f
font_03_sfnt_off0000e131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 10028 bytes
SHA-256: 22db3d140584ba231c991212f8535154ccad12f0c5ffc85c23d5878a70aa16d6

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