Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd3a26ff323f0b6…

MALICIOUS

PDF

47.8 KB Created: 2020-08-08 17:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc8b955151f248c93d960cec31ae18f1 SHA-1: bdebbcb9d60fa1475deb7ae3d542536f815b40e6 SHA-256: 7bd3a26ff323f0b659bdd3f94dbe5fb0b9e90c9386cad009806f69ccdf79b1d5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful sites.

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.com/pify?keyword=tipos+de+acretismo+placentario+pdf
    • http://files.judyiealbilali.com/uploads/1/3/0/7/130739919/7305059.pdf
    • http://files.splitridgerockies.com/uploads/1/3/1/8/131856430/37551.pdf
    • http://files.alliancecustomfabrication.com/uploads/1/3/1/0/131070336/mevegiwegobojodige.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/4910951031.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/pugod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/56132012760.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/kewumowefajutuwobumaguk.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/80456130418.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/zejevixexabalotaretar.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5886/files/tifevo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/24718114534.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9034/files/79355157019.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/amumu_season_6.pdf
    • https://cdn.shopify.com/s/files/1/0436/6408/1046/files/16986411894.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/10324362726.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/online_editor_free_no_watermark.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_off000078de.bin
7ee9c5a5feb4a42b2dfeb0f18677d67897ec4c718b563bd1d3d357a4b554809f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DE 5248 bytes
font_01_sfnt_off00008a9d.bin
25b9284413be289cbbe528ea8a3889934c4b9441a7f5aa468fb1b482739f8685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9D 11804 bytes

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