Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d9998eb12bf42f…

MALICIOUS

PDF

37.6 KB Created: 2020-10-27 21:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 899159a1c6487921d6e8537eb8072597 SHA-1: 198882880f247b366feba515769c88868d8b4180 SHA-256: 22d9998eb12bf42fc1acc04660abbd4f98c90102b4b12f729766bbefb5650850
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The document body, though partially obfuscated, contains a URL that matches the malicious redirector, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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/123?keyword=molarity+problems+worksheet+answers+with+work In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f8c1a7858536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f8caae5b1758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5f984cab99bc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f88156eb194f.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/7963849.pdfIn PDF document text
    • https://soxawanijisal.weebly.com/uploads/1/3/4/5/134513704/fozedozubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5f907f19198e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f89474771036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f87e58f60431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f8fc465a3e60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7756/5337/files/aplikasi_convert_dari_ke_jpg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0434/4481/files/classifying_angles_guided_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2612/8289/files/dadodapeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/towukoderixudisejovinedi.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/anna_karenina_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/passive_voice_simple_past_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/oxford_maths_book_for_class_4_download.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_off00005453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5453 5460 bytes
SHA-256: c527d39ac31897959303b01ba48930f4bf7a2e8147ad940d8d06fb78b05dff9b
font_01_sfnt_off000066d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D8 10096 bytes
SHA-256: 119ca4647fd39ef1bc4263fa82610e8cfc45eca666013b50f134a1eb3445757f

Open this report in the interactive analyzer, or submit your own file for analysis.