Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2c19ea5f2bbf08…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 03:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02dc8d50a8fbafe4d09b5faf29ede79b SHA-1: 1e28665c017f19d4995ac81837216422eedab046 SHA-256: 0b2c19ea5f2bbf0820f27773467483452e10c0f0f8c75cbe6058051a3c8bf4b4
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to benign Shopify domains, but one critical link redirects to a known malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS strongly indicate malicious intent. The document body, though partially corrupted, contains text related to a book search query and a URL, suggesting a lure to a malicious site.

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=data+structures+and+algorithm+analysis+mark+allen+weiss+pdf
    • http://files.ctslutheran.org/uploads/1/3/0/7/130775027/4618636.pdf
    • http://files.dreamscapesiberians.com/uploads/1/3/1/3/131398423/disuruzow.pdf
    • http://files.microneedleregulatory.org/uploads/1/3/0/9/130969989/waroxugos-powimij-kobesozinot-ligidenibiku.pdf
    • http://files.techshark.org/uploads/1/3/1/3/131384098/vetiniwujilozumam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1161/9491/files/codecademy_python.pdf
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/contacto_carl_sagan_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/bob_online_account_opening_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/4292/1883/files/epigenetics_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/93680863351.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/nitowenaxanatusulanag.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2695/files/purikizezitonusuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/herblore_calc_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/36264734719.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/83657252291.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.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_off00006676.bin
a3930ab7f9b8617676e36dc073b1d7db250be0cbd082c4d4c07c1a3742c265a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6676 5828 bytes
font_01_sfnt_off00007a44.bin
0142a92f99374771037ad3aef10def361eabb99a8313f5b2a2e73f180f133202
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A44 10408 bytes