Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a1c92c1efebadf…

MALICIOUS

PDF

37.0 KB Created: 2020-08-29 22:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7472601d5e9d1e374d14e94f3b978eda SHA-1: 60b3cd00ef2871ea13fcbb8c7967690be836fbd8 SHA-256: 84a1c92c1efebadf463c4826a39be447d5b0f801ad0c276cb136e48066ef4868
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. The primary malicious URL identified is a redirector, suggesting an attempt to obscure the final destination. While many links point to benign Shopify URLs, the presence of the redirector and the sheer volume of links indicate a coordinated effort for malicious purposes, likely SEO manipulation or traffic redirection.

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.me/wix?keyword=semantic+gradients+esl
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/sodium_alginate_structure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17673355306.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8872/files/zufamer.pdf
    • https://cdn.shopify.com/s/files/1/0466/9095/9524/files/xiberozixixadaluponob.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/batadofotawivavaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4034/2169/files/esc_guideline_heart_failure_2016.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/zuruzovijubon.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/whatsapp_status_er_apk_for_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/38811455781.pdf
    • https://cdn.shopify.com/s/files/1/0441/2764/9944/files/32750927512.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/46744207844.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/ronopabitusuzosod.pdf
    • https://cdn.shopify.com/s/files/1/0448/1715/4208/files/bartok_mikrokosmos_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0437/6838/1591/files/living_fearlessly_paramahansa_yogana.pdf
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/75422883113.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_off0000538a.bin
2073662f588b962515d1f567ca0b87edef20833db71222af5c058287a4985ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x538A 5364 bytes
font_01_sfnt_off000065a0.bin
0dc27f6a1126193a8f876bccd94dc6b5e3b95140afb3ae77bf30d7267ef82f25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A0 9920 bytes

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