Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d8996271396678…

MALICIOUS

PDF

43.6 KB Created: 2020-08-12 19:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d2ed57ed32d40808a170384754593d SHA-1: 543276ced50f16d869f959b85bb69bbbcbaa189e SHA-256: 69d8996271396678b865a6217db170928a270bfb41a6c0337cd09c20e4b653dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful 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=bottle+capping+machine+pdf
    • http://files.learningdifferencesresourcegroup.org/uploads/1/3/0/9/130969440/6a5707e6.pdf
    • http://wedibeda.victoriavisions.com/uploads/1/3/0/7/130775350/80d3b.pdf
    • http://files.kapnordicskiers.com/uploads/1/3/2/6/132681452/de8eff15f53ab89.pdf
    • http://files.destinationapp.co.uk/uploads/1/3/1/3/131380175/965573.pdf
    • http://gimub.holygemstone.com/uploads/1/3/1/8/131871390/6ff2964.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/57535408062.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/zupijepago.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/86525235291.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/bujogejev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexigubozorabavajodumixi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/biblia_cristiana_de_estudio.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/24314031834.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/xugoxumodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/99976667443.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_off00006b87.bin
b6aeff447baa033bd0cbc2e89a3a68d8a556d334819f4cfb4b771c8fda874052
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B87 5344 bytes
font_01_sfnt_off00007d8e.bin
4ba9268ae8200d50e7ef616c458faf857c70cab2d65462ddcb37f086a645ce40
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8E 10580 bytes