Malicious PDF — malware analysis report

Static analysis result for SHA-256 19639f43ee432d59…

MALICIOUS

PDF

46.9 KB Created: 2020-08-13 05:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ad85ce57abb157dbceb97ddd3903276 SHA-1: f58666f567af30c55691055cace50572ed08a89b SHA-256: 19639f43ee432d59ccc341c8d52e84b51a0bf0297bf197d13e2a8bb6e5d31d5c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'p2219h dell pdf', likely intended to trick users into clicking the malicious link. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious content.

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/wb?keyword=p2219h%20dell%20pdf
    • http://pekix.vblau.com/uploads/1/3/0/8/130874254/62c8547f.pdf
    • http://wegolep.firstunitedpc.org/uploads/1/3/2/8/132814930/2405644.pdf
    • http://files.cccabbrefs.com/uploads/1/3/0/9/130968992/3583446.pdf
    • http://wikuvapu.pieroth-winetastings.com/uploads/1/3/0/8/130813612/xamakidifam_vaboba_joson.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/dagufusubuzumudi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/ucsf_hospitalist_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/1582/2747/files/89597069251.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/airway_management_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/niwetapigosukeledefo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/nozupoxivipuzutove.pdf
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/82966935328.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/architectural_drawing_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/propaganda_techniques_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/british_council_grammar_worksheets.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_off00006744.bin
242541327751c77b2d0804d38b9477c93e65ac4a8ddcefa00dd0b43369a2e85b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6744 4988 bytes
font_01_sfnt_off00007837.bin
7e8fefa4c56f44368c5b769df9e3e050c6b3805fbb1f3e9f69739a65df4dda9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 17248 bytes

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