Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b10ded5d6921e5…

MALICIOUS

PDF

41.6 KB Created: 2020-08-17 11:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f043e459df39d861eee4736f8e81cfa0 SHA-1: 2746483518354070d44c510e6ad4435b41849da0 SHA-256: 16b10ded5d6921e5ebc1c20555a3311c694f8e689b8ae9765d33e62612387092
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a manual for a biometric safe. The document also hosts a large number of links to other PDFs on Shopify, likely for SEO manipulation or to blend in with legitimate content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=barska+mini+biometric+safe+manual
    • http://files.mwmlibrary.com/uploads/1/3/1/3/131379037/1795841.pdf
    • http://files.rocklandcivilwar.org/uploads/1/3/0/7/130775640/335e1c0f24.pdf
    • http://files.cohncentric.com/uploads/1/3/0/8/130874411/logilebizalobi_wozowaba.pdf
    • http://files.elhonline.com/uploads/1/3/0/9/130969435/6ecfe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/31893573540.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7615/files/nutrition_et_performance_sportive_livre.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/pdf_file_reader_software_free_download_for_android_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/pezasalikopavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/jozudakimota.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/bazigar_novel_part_9.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/pdf_to_word_converter_editable_format_online.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/4013028411.pdf
    • https://cdn.shopify.com/s/files/1/0437/0182/9797/files/sijejosabofifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/12518711507.pdf
    • https://cdn.shopify.com/s/files/1/0451/0711/8233/files/87173380605.pdf
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/41326461671.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_off000064bc.bin
5c2c51363214cd0ae4807ce056c191d87412ca3f893d85a2a7e7f3ce8335e7a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BC 5280 bytes
font_01_sfnt_off0000769a.bin
b50152bebd6c39b6fc4cacacd2cf75530ec54af40bb1ff612dbed24222aee072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769A 10156 bytes

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