Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f7413be1dd3a6d…

MALICIOUS

PDF

47.0 KB Created: 2020-07-31 18:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c5c656030d568e8a9b597985548aa4f SHA-1: 6047a2bf0962db65d0afff13eef5866e6db34df2 SHA-256: 31f7413be1dd3a6d54a7f5eef9d570efe551f23d67c04ed59a4071531fe2e83b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious IOC is the redirector URL 'https://ttraff.cc/pify?keyword=how+far+away+can+villagers+detect+beds', which likely leads to further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.cc/pify?keyword=how+far+away+can+villagers+detect+beds
    • http://files.allthingsdunham.com/uploads/1/3/0/7/130739340/402b10a.pdf
    • http://files.sfchoirs.org/uploads/1/3/2/6/132695639/51660b245.pdf
    • http://files.neonearthdesign.com/uploads/1/3/0/7/130776855/4472fcaaa0.pdf
    • http://files.koala-corp.com/uploads/1/3/1/4/131408353/3315049.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/83015378291.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/72284899027.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/1313473163.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/botepujabana.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0177/files/24204429242.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/pukijomizeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/vojeporekigebad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/navajenupizopavaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/latirufigitifazibizewama.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/demujujejewudivivisop.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_off000078b6.bin
c406db9a6876bcf8b823f9468c6f89c10f206c98271d01fe1ae4d8d36f3a2258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B6 5544 bytes
font_01_sfnt_off00008bc0.bin
331f1f1f67cca07be17d417655aedca440c427db9e4250856427b276e3475065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC0 10392 bytes

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