Malicious PDF — malware analysis report

Static analysis result for SHA-256 684a50661a2743fc…

MALICIOUS

PDF

59.0 KB Created: 2020-08-05 04:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1e8fa2e79492d0ba5cd2494de707e44 SHA-1: 96bff61e819ec8f3ca9bc9d54498325cd0eef766 SHA-256: 684a50661a2743fcb3e9e127704f369d3a892f5b968aa34939dbb0469dbda450
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to an 'online business card creator' and includes a link to a known malicious redirector. The document also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The primary malicious IOC is the redirector URL, which likely leads to further 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=online+business+card+creator+pdf
    • http://files.ladyteviot.co.uk/uploads/1/3/1/4/131406403/4537668.pdf
    • http://files.heartrealization.com/uploads/1/3/2/6/132696465/e9add989bfa0ff4.pdf
    • http://files.ellennidanes.com/uploads/1/3/2/8/132814050/8213789.pdf
    • http://files.comfortplumbing.net/uploads/1/3/0/7/130738531/8644552.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/69143305308.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/jonurubezofazogiluwaxej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85155057715.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/m_audio_key_station_49e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/mipimaxidufugulel.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/22525376797.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/43458563154.pdf
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/mastering_elliott_wave_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6887/3112/files/mozexaferuveta.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/66161334859.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/67035056778.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ba5.bin
2e2655afe12d3cccddf355d5fe535d260476f218d0bc376301a4c45b0b6fe8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA5 5200 bytes
font_01_sfnt_off0000ad53.bin
8228824a93a3f7440ca1577b8f9851121ebe9359f5a4cda38d002fc419454872		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD53 10232 bytes
font_02_sfnt_off0000d051.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD051 4324 bytes

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