Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8aac7e4061f9175…

MALICIOUS

PDF

72.1 KB Created: 2020-08-22 10:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4388f493937c0b2e705fdf177981d8d9 SHA-1: 10173dd39b43556b7da20c3d7e3eebddabfc5bff SHA-256: b8aac7e4061f9175e5d0d5a5dc133d9c72eb60536d6cf20e40be540d682dcd8e
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, pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links, with a significant portion hosted on cdn.shopify.com. The document body itself is largely unreadable binary data, but it does contain the malicious redirector URL and several other Shopify-hosted PDF links. No scripts were extracted from this sample.

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=beforehand+information+in+a+sentence
    • http://files.wellnessthroughadventure.com/uploads/1/3/1/3/131383045/lavijemukinelij.pdf
    • http://dilezejof.merriemoore.com/uploads/1/3/2/3/132303338/2871071.pdf
    • http://mewis.t9corp.com/uploads/1/3/0/7/130775565/0c459.pdf
    • http://files.christopherfoxallphotography.com/uploads/1/3/0/7/130740618/7535326.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/8637296181.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8167/files/texaxuvegokeduwodomufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0999/1075/files/9340340235.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/sql_server_administration_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0453/9963/8184/files/dronstudy_class_10_biology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/pemotaregoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/20044326653.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/engineering_mechanics_statics_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/67397583985.pdf
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/concepto_de_normalidad_y_anormalidad_en_psicologia.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/21919667195.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_off0000dc61.bin
85daf23774b856cac4b2d83748401a4b4921d86b9864568f5e5ec49ba6329c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC61 5280 bytes
font_01_sfnt_off0000ee26.bin
42992307bacd7265be349397ccf20fe55f9d3a3f77743a10772d7eee21fe89e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 10332 bytes

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