Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f789c71561a2f02…

MALICIOUS

PDF

40.5 KB Created: 2020-08-13 22:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30ca7a0cdc29f46d021501458e22c641 SHA-1: f4d4f5e12bf7e358300816ce300bb7f48f7d7c05 SHA-256: 6f789c71561a2f02071e73340c7242c9937fe679f7346fb71fd2724d7d7d037c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests an attempt to manipulate search engine results or to distribute malicious content via a link farm. The ML classifier strongly indicates malicious intent, and the presence of embedded URLs confirms the document's role in directing users to external, potentially harmful, resources.

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/pify?keyword=cara+menggunakan+breast+pump+manual+pureen
    • http://xegabon.pthumc.org/uploads/1/3/0/8/130874043/bikej.pdf
    • http://files.intentionaldetailing.com/uploads/1/3/1/1/131164187/a5cc23.pdf
    • http://merokuko.rogstadreunion.com/uploads/1/3/1/8/131855981/vuxoboledi_wizov_wuvan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/43472821220.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/88965895656.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0742/files/orbit_6_station_timer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/esl_possessive_adjectives_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/terraria_server_commands.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/42726028788.pdf
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/cours_sur_la_cirrhose_du_foie.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8222/files/feedback_amplifiers_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/28357343866.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/32957716396.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_off00005fe0.bin
00bea46e93f66b1e80a9aaceed016fa8aef3934eaac8120682b14c7510b1acb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE0 5248 bytes
font_01_sfnt_off000071a2.bin
22f13d391cb07112661bbb5b2ffb015b72955f89a8280dea63a1739e45c0f0ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A2 10408 bytes