Malicious PDF — malware analysis report

Static analysis result for SHA-256 db278b87d1cdbfaf…

MALICIOUS

PDF

38.5 KB Created: 2020-08-25 07:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 976641749648b2e9a2c0057e954d7d8f SHA-1: 644191f524637ec36596f46d7f5ad8b69371abfe SHA-256: db278b87d1cdbfaf6d1361ea77e9bcec2a72d00c2760d0af2f62cf6e1f927f0f
150 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains multiple embedded links. One of these links, 'https://ttraff.com/pify?keyword=ask+verb+3+forms', is identified as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links hosted on domains like shopify.com and other file-hosting sites. The presence of a malicious redirector suggests an intent to lead the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=ask+verb+3+forms
    • http://files.breathewithlauren.com/uploads/1/3/1/4/131437351/424db3.pdf
    • http://files.livingskyfarms.ca/uploads/1/3/2/3/132302883/bijejulunusa.pdf
    • http://files.yoga-cise2.com/uploads/1/3/0/8/130874544/7952785.pdf
    • http://wesomujub.davisionentertainment.com/uploads/1/3/2/8/132814930/viwepi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/kamenanejapobilapewesuwis.pdf
    • https://cdn.shopify.com/s/files/1/0461/9999/6569/files/nikujasudek.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/muditej.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/nodifudite.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/97975570207.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/luxisavus.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/african_traditional_religion_and_development.pdf
    • https://cdn.shopify.com/s/files/1/0432/9776/7592/files/mevunanobajitulezixufun.pdf
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/congratulations_wedding_card_design_template_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004532.bin
72c1ace21bc5f1fdadea9a2d3b87590f7fd0d68d33e53439d77f94e3e3d34bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4532 5088 bytes
font_01_sfnt_off00005676.bin
1409390333b47d47755291fe80e4f0a34e75d449df04b76f9e0788cdb74dcf37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5676 9700 bytes
font_02_sfnt_off000077ee.bin
0674acd334b5d9d24fca46324cf24cdceda2da50095ae44f67deaeca14b27464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EE 16240 bytes

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