Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79ca6ea94d3d168…

MALICIOUS

PDF

50.5 KB Created: 2020-08-17 00:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55268bdd72abb0c754ef9ec7d903882c SHA-1: b7b1b44dbd0f3eaeb1caee7b02b95f6eefde289c SHA-256: d79ca6ea94d3d1680381140d92289d87c43e371db4bd5ab617064622589ac17f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=antenatal+care+guidelines+fogsi, which is likely intended to lead the user to a malicious site. The file also contains a large number of external PDF links, suggesting a link farm or SEO poisoning 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=antenatal+care+guidelines+fogsi
    • http://files.grandaveplaza.com/uploads/1/3/1/3/131398095/zujupodo-vomasumivofagi-xonovogaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6981/files/aprendizaje_basado_en_proyectos_secundaria.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/clicker_heroes_idle_build.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/lixevikunumudasesanotiguk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3279/files/kawavewizeper.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/fuverasazinoguj.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/wewajunebevidakajosugap.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/wefusuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/extent_reports_in_c_relevant_codes.pdf
    • https://cdn.shopify.com/s/files/1/0439/4346/1032/files/zuder.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/engineering_mechanics_dynamics_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/doduwakuresubowudiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1491/files/coda_shop_apk.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008823.bin
a55ad7c6fb78bd3e3854dde9ac9f910f07e1f767dadac2d817177a67bfb6243d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8823 5180 bytes
font_01_sfnt_off000099c7.bin
88814a6030b22af46382a7fa8eb22cb2f8da7ac4511895e5389ba47cda60e02c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C7 10264 bytes

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