Malicious PDF — malware analysis report

Static analysis result for SHA-256 19004f70c2bc18a9…

MALICIOUS

PDF

59.1 KB Created: 2020-07-31 08:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed8a18e926b5ef49de41bc6078754d53 SHA-1: d28d431778b2dde7428015d8ab73d4c040110a9d SHA-256: 19004f70c2bc18a9daf965d4ecf77cd5db982157dafd3a1f97ba48cbae23b495
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to generate SEO traffic. One of these links, ttraff.ru, is identified as a malicious redirector. The document's structure and the presence of numerous external links suggest an attempt to drive traffic to potentially malicious or ad-heavy websites, likely as part of a phishing or scam campaign. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=basic+afrikaans+words+and+phrases+pdf
    • http://files.wrobertconnor.com/uploads/1/3/0/9/130969678/rotarinumoxuzaxipivi.pdf
    • http://files.motivelove.com/uploads/1/3/0/7/130776291/gonuvatanufubus_dirufopeked_sizetojisevaze.pdf
    • http://files.katemathiasauthor.com/uploads/1/3/0/9/130970004/xujepuzubefonaw_jalele_nowujijudage_jufibubebiju.pdf
    • http://files.my31sisters.org/uploads/1/3/2/6/132695629/rolox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/wodazagupufajelaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94192334972.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/jelerorexifurunowopilet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/wawola.pdf
    • https://cdn.shopify.com/s/files/1/0430/9028/0609/files/pesoxiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/1743/6317/files/wirewakedivaselunugi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/tisomefiwagefoketit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0363/3051/files/15403894629.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090c0.bin
8b3c8dd3f738009cb84a8f4a685c2ce51c4f3111dfb1bfe24a19a2b3a9baab92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90C0 5124 bytes
font_01_sfnt_off0000a228.bin
a0d94de05994d79c758fbe9b99ba0d88a2fa087a9c6cd4121fdcc530f1d8fa96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA228 12328 bytes
font_02_sfnt_off0000ca58.bin
ff88491e9b53368aa3a30e8dd34a5b3a2a650623abbadb69eae8d512e7150c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA58 16084 bytes

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