Malicious PDF — malware analysis report

Static analysis result for SHA-256 092ca7808b28418e…

MALICIOUS

PDF

47.0 KB Created: 2020-08-02 18:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11d03687ca68d254cbdefb8edb334c85 SHA-1: d2a882b0563d6052a6e279501d78903ac0af636c SHA-256: 092ca7808b28418e49f5b7e66694a88cc44e38582692d5f1b831248830fd61a1
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=node+js+download+file`. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The presence of a "download button" lure further supports the malicious intent. While no scripts were extracted, the document's structure and embedded links strongly suggest it's designed to redirect users to malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=node+js+download+file
    • http://files.alchemymovement.co.za/uploads/1/3/1/3/131398555/c3c9f98cebf178.pdf
    • http://files.mikearcherphotography.com/uploads/1/3/1/3/131398113/3835d.pdf
    • http://files.karlasnewhope.com/uploads/1/3/0/7/130775747/dosojosim-mabedokawisumem.pdf
    • http://files.thenewhoosierbroadcasters.com/uploads/1/3/1/4/131483440/380240c73100f9c.pdf
    • http://files.stonehilltheatricalfoundation.org/uploads/1/3/1/0/131070212/8939837.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/fugojalebubirulinesixam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/fosofekadoxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/bekefeviduti.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/tukotajij.pdf
    • https://cdn.shopify.com/s/files/1/0436/2479/2224/files/viwenebakuzudotew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/kunivigosupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/petasatazoxakigakefunuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/84327008521.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/54706901766.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96617946950.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/bandwagon_propaganda_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/dipenodofowipesugalozale.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_off00006d93.bin
12bc9506cb06127b074d54a3e0405a4d7a96df69e0ce63287f3e956e55f2f8b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D93 4940 bytes
font_01_sfnt_off00007e91.bin
6ddce0377f61f53224c016f4c1db467bf3dc3ea7521a92be64c48439c8cf073f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E91 15256 bytes

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