Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8486cb4f389960b…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 05:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c14465a78400d3d22f8cbfd3dd39e4a SHA-1: 3121929b5dd9e96a24b01cfaaf26c78615dc741d SHA-256: c8486cb4f389960b09492cebc28652c9f60460fea3c0a2e4fa3db62e0676c2d5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link: Malicious File

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links directs to a known malicious redirector. While many links point to benign Shopify-hosted PDFs, the presence of the malicious redirector and the sheer volume of links suggest an attempt to manipulate search engine results or distribute malicious content indirectly. No scripts were extracted, and the document body is largely unreadable binary data.

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=appsheet+multiple+select
    • http://wowezok.frhsbands.org/uploads/1/3/0/8/130814328/gevekix-suxegiba-tavasobonetoser-suraludiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/benim_hocam_tyt_corafya.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/36311081392.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/lomulogelugisolivanino.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/esl_brains_reported_speech.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/different_types_of_hand_embroidery_stitches.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/lebolenene.pdf
    • https://cdn.shopify.com/s/files/1/0428/2974/2246/files/sap_crystal_reports_2011.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/lulefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdf
    • https://cdn.shopify.com/s/files/1/0430/4705/9607/files/27195898515.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/47373026399.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/74905830912.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6207/files/wibewewezijutelewokabob.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_off00006534.bin
af6e560048adcf23e5e08a3da4a6f06bbd70106796d9009bcdfef9cde19bbe2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6534 4856 bytes
font_01_sfnt_off0000759c.bin
7c35fd506a366122002a9bb20b143f241bfb2d02cb7076569732b1a14fc02e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759C 13228 bytes

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