Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cccd1d008382cb6…

MALICIOUS

PDF

46.5 KB Created: 2020-10-23 07:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2a248b14fbd2c7458fb416fa7455b3b2 SHA-1: 36120f73062678befe0f9a00612c1054d572b789 SHA-256: 4cccd1d008382cb6e1a4eb72376dde1a83add12315973f2994e9a7f468a1f54b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable hosting services and a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches one of the extracted malicious links. This suggests the document is part of a link farm designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://gettraff.ru/123?keyword=worksheet+english+grammar+pdf In PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/fotorugifefowukov.pdfIn PDF document text
    • https://peketavapi.weebly.com/uploads/1/3/4/3/134331612/6059934.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/vejufon.pdfIn PDF document text
    • https://xuzowezawejinat.weebly.com/uploads/1/3/4/3/134378303/sozawuxob.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f8c70ca6a0e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5f8ac40b328aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f8ba9989ba6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8fc07eac583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f87f30a35699.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/b72ee7e5-8a52-456f-a072-8f61d54b2c1e/elsword_freyja_pve_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4108539d-32cf-452f-bf72-49f29af487bf/99996658113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d68ebefa-c11c-4899-8714-f9c2ad7177c2/sasoxulif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8393/2851/files/78730222028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/arabinose_operon_positive_and_negative_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc607d9-4e4f-4508-81a8-7a792b40e22a/xaxavijitofezatuluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd24282-d052-48c1-a997-70518b6cc66a/94781718068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e8bf8c-98d7-48c5-85a9-7896cca05ecb/87417160107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b34d4b06-2b98-4c46-8c28-5b5aef9760fe/33990814679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfd6d2f-d14f-4ca6-aef5-951cce17d09b/65983138641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c1b616-2102-4bcd-97e0-5db04d1de6e0/lerosawusivonodik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdabcdac-7d3e-4185-8944-e117ca6b0e2b/834103763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2dfc663-c83c-4272-94e9-6828e0dee1cf/47359232206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7387c972-f04e-4a6b-92f7-62202b6b658e/sozaroxijerinenajugigu.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_off000073a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A5 5532 bytes
SHA-256: a0f5329c3f2be0e62e919e9991335f5b243d4eb3b650ef2064c88aa7ee3a140d
font_01_sfnt_off0000865e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865E 10696 bytes
SHA-256: 4136afaed01bbe5d19ebc34ba95388c1d1ad83a92c650f963daf6d5a78479c12

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