Malicious PDF — malware analysis report

Static analysis result for SHA-256 a558fbe4849a1401…

MALICIOUS

PDF

42.1 KB Created: 2020-08-02 19:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb0897a72db31c9d8ddf097d32555b6f SHA-1: 7bbed5e98be0344d90b911eedcb1cd2bdbd81bdb SHA-256: a558fbe4849a1401d3600f5771fe0464164b1fbb08f7b5fb9741753d0ee7e3a0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=parallax+effect+css', which is identified as a malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many hosted on Shopify domains, likely to obscure the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=parallax+effect+css
    • http://files.electricaloutlet.info/uploads/1/3/0/9/130969300/napelugaxu.pdf
    • http://files.littletownbakeshop.com/uploads/1/3/1/3/131379406/wudatujeweruj_rewusokuru_zagusador_mitidumaw.pdf
    • http://files.heathernorrisart.com/uploads/1/3/1/0/131070911/3232621.pdf
    • http://files.mmeramirez.com/uploads/1/3/1/8/131872286/596220.pdf
    • http://files.simplifycoaching.net/uploads/1/3/1/6/131606261/6641e7b75679be.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/fakazenele.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0432/8469/3160/files/fozapiriruwagutava.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/jojewewifufuranojulegabuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/84881128299.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/womazerozolevovisomopofev.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/89925775150.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/kabukoxeso.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/xumefol.pdf
    • https://cdn.shopify.com/s/files/1/0437/8954/9729/files/celebratory_dye_pack.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/nepiredadalom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/debesanapafaxelurovawat.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/desijedesefili.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000651e.bin
8972ba91cd1179cfd6d6f49f46634604431eaad2ffff35d586c51183cc38bd40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651E 4944 bytes
font_01_sfnt_off00007602.bin
502e48ae05a19c03aed7a7041f5a33e22281e20c2c2e92a190eda4c5ca34dfc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7602 10952 bytes

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