Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be799e45ad9e4e5…

MALICIOUS

PDF

77.1 KB Created: 2020-11-02 17:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 55093910f8aa32f6caf5e143cfcbb607 SHA-1: 5dc75ed53f9a526936edc7e9df2be4307beee2ee SHA-256: 8be799e45ad9e4e54ece8b641fb80e685732dee34cd750413f3da3326e17359c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though partially corrupted, includes the same URL, suggesting a lure to a malicious site. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination.

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://ttraff.ru/123?keyword=biology+end+of+course+study+guide In 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/1/0440/7017/4870/files/gumunirutebanazep.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/66148047760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4287dc9d-cd9e-422d-905c-608e2222fa89/70615945062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59beec45-57c0-42ca-bac3-ed02218df8f7/new_york_art_expo_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/kapatibepagadabimezulan.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/xibijeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/7171/4491/files/magna_bike_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/maxthon_browser_apkmirror.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/12962605007.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/63467204160.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/aligner_orthodontics_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/psoriasis_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/6151643345.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 5132 bytes
SHA-256: e6ae51865463c17c4555fc919358c62c76fb440ef57766603f893a044e2a626d
font_01_sfnt_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 11072 bytes
SHA-256: 723b01fbc69f9684bc5cbb1c2f543616a0733a92324e03acac9f00a2e2acbec9
font_02_sfnt_off00011271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11271 16060 bytes
SHA-256: 3a2bb6651a5ad642813d1e324805fe83a688734d44fd23e014c0665a2602df32

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