Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df21affb7e9ce06…

MALICIOUS

PDF

47.6 KB Created: 2020-08-19 23:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 734df8cee64a0faa860ae5eec28203b8 SHA-1: 1810e0046166ab5dffd691d0c9afc72d307f5025 SHA-256: 1df21affb7e9ce0668eed2de9fae67c8235e0b6eb7977fbda3518e5656a060e8
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, many pointing to Shopify-hosted PDF documents. One of these links, 'https://ttraff.ru/pify?keyword=square+root+calculator+radical+form', is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, potentially leading users to malicious sites or content. No scripts were extracted, limiting the analysis of direct payload delivery.

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=square+root+calculator+radical+form
    • http://files.sandraclarke.ca/uploads/1/3/1/8/131858916/3810691.pdf
    • http://files.thecitydesk.com/uploads/1/3/1/0/131070485/jawemulerozije_megidorotasi_jafag_nubopu.pdf
    • http://files.dietinterventionandautism.com/uploads/1/3/1/3/131383838/jorufomarerazem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3421/files/28219337982.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/super_contra_cheat_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/1757/6354/files/sorikepovorozejibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8890/files/school_magazine_cover_design_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/werakofitiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/66492837338.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/33536274456.pdf
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/native_american_cultures_readworks_answers.pdf
    • https://cdn.shopify.com/s/files/1/0447/3644/6613/files/router_buying_guide_2016.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8172/files/effortless_english_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b14.bin
236e61452e9dcb6f82ac4eb901db6c13e17a9176edc10f75cc50459b468981ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B14 5220 bytes
font_01_sfnt_off00006cb5.bin
22e15d534d9e5944fbde715bf70f579a3f6fe172d788b21ca1ba1ebd70d3dcf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB5 15320 bytes
font_02_sfnt_off00009cd9.bin
e3d583ca8131484f6b7e9991674a220a85ec8466745261d702706f92b0246cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD9 16080 bytes

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