Malicious PDF — malware analysis report

Static analysis result for SHA-256 03902b1e7ad21c6f…

MALICIOUS

PDF

45.4 KB Created: 2020-08-08 10:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0639606ef56b56a59bbc2179b8a9037e SHA-1: 7ee95c6d03a1d49b5b3ff76a94c73b50c0fde513 SHA-256: 03902b1e7ad21c6f1f2fb3d3d04d70aaf0f51ca6c99551d2c32b0f8d3b496684
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, indicating an attempt to lead users to harmful content. The embedded URL and the document body text suggest a lure related to 'CCNA wireless notes PDF' to encourage clicks. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

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.cc/pify?keyword=ccna+wireless+notes+pdf
    • http://files.meatfreemondayfood.com/uploads/1/3/1/8/131872037/573587.pdf
    • http://files.celandscapers.com/uploads/1/3/0/8/130813427/b292c86bd4.pdf
    • http://files.georgestewartartist.com/uploads/1/3/2/3/132302951/gexilumudizone-dijezo-nabogo-tujomubaza.pdf
    • http://files.trailsofhopeandterrorthemovie.com/uploads/1/3/1/0/131070588/povukifal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/gusasaretivoti.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/biggest_city_in_kansas.pdf
    • https://cdn.shopify.com/s/files/1/0430/2723/4969/files/zefetufevaxifiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/dakexukosobokuxefikebog.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/43150539275.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/89034026116.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/pubitujutu.pdf
    • https://cdn.shopify.com/s/files/1/0450/2195/4206/files/mcdougal_littell_algebra_1_resource_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujar.pdf
    • https://cdn.shopify.com/s/files/1/0440/0149/3142/files/application_letter_sample_for_fresh_graduate.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/23104842131.pdf
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007292.bin
3b3842555fd61f0b713b8a7820509c1ad4262bcc6be99b0c7a450795ed370f54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7292 5148 bytes
font_01_sfnt_off00008432.bin
7ad514f862391c7189da10472296057144d4f56ff01a4b564318296cd68e0a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8432 11148 bytes

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