Malicious PDF — malware analysis report

Static analysis result for SHA-256 f421ed4f805992d9…

MALICIOUS

PDF

38.8 KB Created: 2020-08-16 14:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70d9b20e39ddef150647530263132511 SHA-1: 204e924a35b17115bab7d9e266c51d7374430be3 SHA-256: f421ed4f805992d9851c144cf4d27af85aeae9f5eedcf2f0412bfa984c935f81
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=risk+assessment+form+sample+iosh', is designed to lure users into clicking it under the guise of a risk assessment form. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The primary malicious URL is the most significant IOC.

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=risk+assessment+form+sample+iosh
    • http://lifabo.cedarhillsoaps.com/uploads/1/3/0/7/130775432/cbb7e2afb4.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/23089832640.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/jixivapip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72619586694.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2813/files/libro_bhagavad_gita_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/17371254707.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/53888583475.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/kakugosunilawapasufowadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/zivitavobamubawemoranedon.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/73182101635.pdf
    • https://cdn.shopify.com/s/files/1/0435/2504/6423/files/wozonuxija.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_off00005aab.bin
da5a1bb72b481955bd7e0662f95705ce1f5d23b80ea1482499d5ff6375adf91b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAB 5212 bytes
font_01_sfnt_off00006c3a.bin
f48bab657a50b1330d7bb8df3b6ec9d041842860976097d56a55fba404cafea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3A 10072 bytes

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