Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d851668486e8639…

MALICIOUS

PDF

45.1 KB Created: 2020-08-10 18:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 002d3e8c23161b326a3b8137a863d904 SHA-1: 250dbe1ea22d016c80caf0237845b9db81df23c5 SHA-256: 0d851668486e863965ccfbfc8610f1a09c629fe3785206f48bcf5877788f3088
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a link farm hosted on Shopify, which is a strong indicator of SEO manipulation for malicious purposes. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=aneurysm+clips+pdf', is identified as a malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise.

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.cc/pify?keyword=aneurysm+clips+pdf
    • http://files.aquastarssynchro.com/uploads/1/3/0/8/130814390/cc3f89.pdf
    • http://files.acaringcommunity.com/uploads/1/3/1/4/131437119/4679490.pdf
    • http://files.cckidsfamilies.com/uploads/1/3/1/3/131381539/9366823.pdf
    • http://files.rydalmerefc.com/uploads/1/3/0/7/130775357/ce1539ca91f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/arabic_ocr_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/causative_verbs_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3453/files/tipos_de_incendios_florestais.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/lefijopusujinanoguke.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/91819570984.pdf
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/sakawifapepivixotibiwafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/87165595167.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/89695136347.pdf
    • https://cdn.shopify.com/s/files/1/0435/9038/5821/files/59832482676.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_off00007338.bin
94e49c55ea8ba6ddba3bc273449e31b3f8b9b1cc5a92a5d3555e1681f110b1d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7338 5180 bytes
font_01_sfnt_off000084c6.bin
f304900bd614e5f25279ab76a8c930a06c4c941b7d1c97c5f6ad82c7bf547060
pdf-font-stream PDF embedded font (sfnt) at offset 0x84C6 10192 bytes