Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ad2e401d2fc461…

MALICIOUS

PDF

43.2 KB Created: 2020-08-14 00:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29275d2e6ea6a42cdd1d34c84797d62d SHA-1: 6240ff612eee4887ac57423a34e8d94ba8501879 SHA-256: 82ad2e401d2fc4617f57c0e17487d90a4a64e3f5ab5720ab6a867af582ec9b70
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view content, which is a common tactic for credential theft or malware installation. It contains a high number of links to external PDFs, some of which point to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=chrome+77+mac', likely intended to redirect the user to a malicious site or download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=chrome+77+mac
    • http://gipupebe.flintandsteelproductions.com/uploads/1/3/0/7/130738720/2242835.pdf
    • http://files.txstateflutes.com/uploads/1/3/0/7/130738512/22bdc239d1.pdf
    • http://files.literarycats.com/uploads/1/3/0/8/130874307/47d877a9f5.pdf
    • http://files.denbighlocksmiths.com/uploads/1/3/0/7/130776449/rofevifatunop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3097/7434/files/wukapusuruba.pdf
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/57675162498.pdf
    • https://cdn.shopify.com/s/files/1/0435/7950/6847/files/anatomie_du_coeur_grenoble.pdf
    • https://cdn.shopify.com/s/files/1/0449/8613/8792/files/josaa_counselling_medical_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/53089071640.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/honda_fit_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/11829749851.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/44195152085.pdf
    • https://cdn.shopify.com/s/files/1/0429/7034/9731/files/8432496008.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/89622583752.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/zenulaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/vawevuxobezuzon.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_off00006c81.bin
6fd7f6aca5f44c138b0c9ed135ee279886e5749557e0258e343c0761aabceb4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 4812 bytes
font_01_sfnt_off00007cb6.bin
bd0affb985523b6b3cdde128f542652eb53f08be1fb7edec8623e81df56fc880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB6 10420 bytes

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