Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65111e405666989…

MALICIOUS

PDF

33.8 KB Created: 2020-09-20 09:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18a41323428013681c472e0c1c2c6e2c SHA-1: 10f38851a39b827c79987cde42fb3eec8ddbe3f7 SHA-256: a65111e40566698914325072754e62f73b69746587595dfb96401c8b647f7098
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=mixtures+and+solutions+worksheets+grade+6'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one also leading to a Shopify domain. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify URLs, suggesting a lure to external content.

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.club/wix?keyword=mixtures+and+solutions+worksheets+grade+6
    • https://cdn.shopify.com/s/files/1/0434/6534/3133/files/17576739918.pdf
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/puruzuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/62138949062.pdf
    • https://cdn.shopify.com/s/files/1/0441/2764/9944/files/gufevimikuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/figogorefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/fugonumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/unisa_online_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8514/files/android_studio_video_tutorial_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/zibubu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/fesogobuduvujujenegamudus.pdf
    • https://f0b8d882-860a-4e69-b0aa-d719f0871097.filesusr.com/ugd/9ef0c3_4007aa695ceb4f67a3a4cda278fb6560.pdf?index=true
    • https://b16720df-cf47-4b91-b923-125412b53272.filesusr.com/ugd/3d0627_9ef0ab134e5545218829fce79e11bc25.pdf?index=true
    • https://355bfafc-d520-4743-874a-256e4f285288.filesusr.com/ugd/98e2de_008bd681a595400c90356302fa491b41.pdf?index=true
    • https://5c596c0a-e8f1-4572-a303-fd6e3a6483e0.filesusr.com/ugd/1cc777_678d91d0014b440c985db873985561d7.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000452b.bin
8983e64cfe97afba137bfd55ae8e72df9ec1f9626b8640e46f1fb7f8f1d09a76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x452B 5468 bytes
font_01_sfnt_off000057df.bin
287ca6db23f09e80df48d974cbb59699b601fb9bc1dbd90a4000f329159becae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57DF 10084 bytes

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