Malicious PDF — malware analysis report

Static analysis result for SHA-256 548ad3c7e59f2532…

MALICIOUS

PDF

55.8 KB Created: 2020-08-09 18:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98dc39e0d39599b8ca14d84a5e216211 SHA-1: a46f1a9e3b73072699155c52e457b17d7ecb60ac SHA-256: 548ad3c7e59f2532b67ed1730047b56b861d7c60da82dcf2a90ed51e54844c12
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=estrategias+de+ventas+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes the malicious URL, reinforcing the lure of sales strategies.

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=estrategias+de+ventas+pdf
    • http://files.gettruckedoz.com.au/uploads/1/3/0/7/130740090/951c62.pdf
    • http://files.easternsloperanch.com/uploads/1/3/2/6/132681404/3588728.pdf
    • http://files.catandcrow.net/uploads/1/3/0/8/130813851/676ae8.pdf
    • http://files.shauneb.co.uk/uploads/1/3/0/7/130776516/1001233.pdf
    • http://files.sacredtellings.com/uploads/1/3/1/3/131398541/e655fb.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/38970157465.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/16474624073.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/69288456229.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/lajevalejibikoxazodas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/4527532600.pdf
    • https://cdn.shopify.com/s/files/1/0437/6612/0602/files/arduino_mega_2560_projects.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5622/files/4668895012.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/predatory_instincts_risk_of_rain_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/1914/9216/files/32878874291.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/3992262622.pdf
    • https://cdn.shopify.com/s/files/1/0430/1167/0179/files/introduction_to_kinesiology_4th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/gowek.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_off000098f9.bin
5a09df5c508974aeb10098191bef1e58d2083468e72f7bfe8d59dd3935092b8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x98F9 5196 bytes
font_01_sfnt_off0000aac3.bin
26cb93454e30cab2e9605f038c3c1c7f34e9df80ba4f7b2cc332c1a9e4c05c46
pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC3 11652 bytes