Malicious PDF — malware analysis report

Static analysis result for SHA-256 342c6cd555162b3d…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 20:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 206bdf1e8e740f7963f94ca81b940190 SHA-1: 762825811c7dd8865d95c3967d57dcc9fad11700 SHA-256: 342c6cd555162b3dad647f6340c6e96c78121a162b0899b2f9764b14475c45e6
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Gta online doomsday heists' and a URL that appears to be a lure. The presence of numerous external links, many hosted on Shopify, suggests a link farm designed to obscure the malicious redirector.

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.com/pify?keyword=gta+online+doomsday+heists+guide
    • http://files.board.solonchamber.com/uploads/1/3/1/1/131163859/rabojofavafupozakebu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/the_college_writer_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0469/files/37085651227.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwunojipodaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/18708625703.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/8732387073.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/american_restorations_las_vegas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/country_code_ee.pdf
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/divi_mobile_menu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/26523506452.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/25235995631.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/49566594318.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_off0000627f.bin
e9607e27d1efe942f9105bc1ddc42a218057562b1f4a0fee88cbe7223059bd58
pdf-font-stream PDF embedded font (sfnt) at offset 0x627F 5276 bytes
font_01_sfnt_off00007458.bin
ac2efc1d6ee0199cfd1dae6b204b1aadbde8bdf2e374bbd2caa544156f92c263
pdf-font-stream PDF embedded font (sfnt) at offset 0x7458 10604 bytes