Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4358028992795e…

MALICIOUS

PDF

58.3 KB Created: 2020-08-19 08:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fbc9cdd7cff1fa4e7289a748fa5b7b9 SHA-1: 4e65ce9f94b020d4fb8b6859bdf0a273a0f00269 SHA-256: ab4358028992795e05a045110313859d76a0fd5b301af06cc346655118b48154
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to its inclusion of a link to a known malicious redirector, ttraff.com. It also contains a large number of external PDF links, many hosted on Shopify, which is characteristic of a link farm. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=novena+de+aguinaldos+colombia+pdf
    • http://files.tilbcc.com/uploads/1/3/0/7/130775045/62835832fa5198.pdf
    • http://files.tilbcc.com/uploads/1/3/0/7/130775045/6283583
    • https://cdn.shopify.com/s/files/1/0436/1597/7630/files/bisaguzawegires.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1075/files/swka_angielski_b2.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/vatog.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/astronomy_merit_badge_pamphlet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/80574181977.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/unlimited_power_by_anthony_robbins.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/wowevutaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/57697866321.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_off0000a29b.bin
2a4040a3165172469825b59fdf3e676d58425a6cfaf02d1c45fb3a26cacbdf42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA29B 5548 bytes
font_01_sfnt_off0000b578.bin
351f7ff7b7fa4f1e74d9db32b42f21e966be0e8311cb2376917a7d2ea07f7526		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB578 11400 bytes

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