Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e3cd8ec3bcc677…

MALICIOUS

PDF

41.9 KB Created: 2020-07-27 05:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77951bdf07ca1119e293b2d995a192ba SHA-1: 43bb238a2f26b172c07dac1e441085c71b2cd711 SHA-256: 25e3cd8ec3bcc67728875a0271696a5aaec06c736e22a331cd0d1eb53c4629e0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=p+a+c+force+full+form'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of numerous links, including one to a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

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=p+a+c+force+full+form
    • http://files.vixnglam.com/uploads/1/3/1/8/131871919/5630562.pdf
    • http://files.eldaag2019.com/uploads/1/3/0/9/130969143/4924873.pdf
    • http://files.brandonjreilly.com/uploads/1/3/1/8/131856827/rojeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/pivew.pdf
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/44168419573.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/19601402528.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/vugadepudovusezinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/xajodoxurapojodemagofa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/dotisuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/jinigigixotasarek.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/31286652213.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/koribowaguzipemesebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/bibadadosuloxekuxegunod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/82532113670.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.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/
    • https://cdn.shopify.com/s/files/1/0435/3405/7621

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697e.bin
3d1e3af0b8432144c8866b7698b61757c86b1906be7bee462d85094499652120		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697E 4500 bytes
font_01_sfnt_off000078ba.bin
5c332ec13e9fa240329705a5b4d528d78dea37ba06d55744a97a337809883d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BA 9948 bytes

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