Malicious PDF — malware analysis report

Static analysis result for SHA-256 84192c6997962653…

MALICIOUS

PDF

43.4 KB Created: 2020-08-09 10:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e78fbd61a4b4da07c98e49b0a30c1330 SHA-1: d1d6c70098f77e10eb95841dcfd31f0f9cd24a2f SHA-256: 84192c6997962653c0223b3b41282e19a9da84929b864f1fd842c523e62d4de2
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=editorial+cartooning+tutorial+pdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links indicates a link farm, likely for SEO manipulation or to host further 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/pify?keyword=editorial+cartooning+tutorial+pdf
    • http://files.janisseray.com/uploads/1/3/1/4/131453990/6504325.pdf
    • http://files.soulsurvivorsband.com/uploads/1/3/1/4/131438111/wasazuvodon.pdf
    • http://files.exquisitetouchdesigns.com/uploads/1/3/0/7/130739379/mageleduni_mojivevebuj.pdf
    • http://files.chanelneversdesigns.com/uploads/1/3/0/7/130775980/ba18adbb3c78.pdf
    • http://files.cableporter.com/uploads/1/3/2/6/132696155/d1fbf7a30de97b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/sodenajejogakolu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/18342712723.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/daxabuzubejeruzukofuwute.pdf
    • https://cdn.shopify.com/s/files/1/0439/8707/5230/files/how_to_use_manual_locking_hubs.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/mastering_bitcoin_unlocking_digital_cryptocurrencies_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/kagobewe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6619/files/3557915145.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/sikoxub.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/2704009993.pdf
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/xamuzupoximezufeli.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/javiponiwamijededu.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_off00006d01.bin
00dcb94185cef8abd4546c2ec5c671309ee200437597a414fef244e19a394053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D01 5104 bytes
font_01_sfnt_off00007e72.bin
04f592911db82d9005112acaf1c3b4179d49a5651a9637893c21958272e67215		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E72 10088 bytes

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