Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d41f8c7e2cf9347…

MALICIOUS

PDF

50.6 KB Created: 2020-08-04 00:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8426c14727df0c4dd57af8344170da3c SHA-1: 883c1a0591c039f3825d641c54093772373faf24 SHA-256: 7d41f8c7e2cf9347067fded18c14d70656042cd215b8a793819e26ba37a31544
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external resources. One of the primary links, 'https://ttraff.ru/pify?keyword=asme+b16.+9+standard+pdf', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest a link farm or phishing attempt designed to direct users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=asme+b16.+9+standard+pdf
    • http://files.gospelkc.org/uploads/1/3/0/8/130814208/vurawadoxalofub-tavimudu.pdf
    • http://sodobutib.tiffanymcfaddenrd.com/uploads/1/3/0/8/130813577/c246267981676.pdf
    • http://files.frontporchimports.com/uploads/1/3/2/6/132695387/mizuxukiwimipor.pdf
    • http://files.roblightbody.com/uploads/1/3/1/6/131636775/xabukoguru_soxameremapuk_nonibewajuki_xogesam.pdf
    • http://files.helenkurkjian.com/uploads/1/3/0/7/130776338/rezuxijejojaj-lemes-zobavulen-xixegewutedasa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8846/9411/files/16739370785.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/patas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/88246546322.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/bipiwojemilenabido.pdf
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/bionic_leg_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/42420278882.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/vilorenojunoninolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/23374492732.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/68698529916.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/nufefirera.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/56066952418.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/http_filesify_com_t2bgbe_password.pdf
    • https://cdn.shopify.com/s/files/1/0429/8339/1395/files/juletapubiv.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008833.bin
392623cc656bdf50c91033a6e35c6ffdedd9ed5cd8b107b8e6d57f7b1e6fc0bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8833 5680 bytes
font_01_sfnt_off00009b70.bin
1f062d1b82ad15ca848fddc124101342bb895f0ec73cb98b77851055f687d50f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B70 9980 bytes

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