Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb61cdf44cac68dc…

MALICIOUS

PDF

43.9 KB Created: 2020-08-06 14:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00bc03fe50a13eb4547fe56fed9a858f SHA-1: 1fcd7f6fe9630cc43d78926cc962760365f9ec59 SHA-256: fb61cdf44cac68dc892f14ff8fa72116e1707be19fc6634533ab304132ef9639
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, masquerading as a link farm. One of these links, https://ttraff.ru/pify?keyword=causative+verbs+test+pdf, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=causative+verbs+test+pdf
    • http://files.jonathanwilliamsonphotography.com/uploads/1/3/1/3/131398457/617e6dc79fe5.pdf
    • http://bexaxi.courtrobertarts.co.uk/uploads/1/3/0/8/130874431/zibomaxem_nirujamegiz_zabopolutudu.pdf
    • http://files.dartendistrict.com/uploads/1/3/1/8/131856381/jarukid.pdf
    • http://files.jecha-networks.com/uploads/1/3/0/7/130739265/0f3b4.pdf
    • http://files.subnum.org/uploads/1/3/0/7/130776208/sudidojakadefi_zufuvok_sudux.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/65970341725.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/8825824070.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/87250569574.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/canon_pro_100_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/8022/7747/files/86675764294.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/87037347698.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/nunaxuragopixit.pdf
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/natural_products_as_antimicrobial_agents.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/kujanabefuzuvanuwiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/zakekigi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/55699193047.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/28626021039.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_off00006426.bin
a1d4e83ffed7438ea9441abf594583d029a80980a4ea20da0c01f1742080f5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6426 5108 bytes
font_01_sfnt_off00007592.bin
32bc7b462d354c4d6c24b2499f4029423791018c37d985e6c6531c0d3495da11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 14704 bytes

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