Malicious PDF — malware analysis report

Static analysis result for SHA-256 a059eada8b57fa77…

MALICIOUS

PDF

66.2 KB Created: 2020-08-11 08:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97a48c4679d7f32434ae8d7ca3ea8bea SHA-1: dd2f8150467af370cb6f4a663ded547fecb98c65 SHA-256: a059eada8b57fa77f60e9d5b8cbfc40f93282d373b6596bdea6b54b4fc197e7d
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=phenolic+compounds+in+food+pdf, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains references to the topic 'phenolic compounds in food pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious link farm. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=phenolic+compounds+in+food+pdf
    • http://netudepa.mrsperkinsclassroom.com/uploads/1/3/0/7/130776106/rexewijige.pdf
    • http://files.jillianchristoff.com/uploads/1/3/2/7/132710694/wuronemewava_xejuwefutidora_votudi_zekosowubufeve.pdf
    • http://files.mirrormymind.com/uploads/1/3/1/4/131452935/be94157b5d.pdf
    • http://favevaro.mobileboutiqueadriannemerkling.com/uploads/1/3/0/8/130874633/kukefetakirun-kitemuju-pagewu-rotavomoxigu.pdf
    • http://files.barbershopsingers.org/uploads/1/3/0/7/130775903/jifafun-xogaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/bpmn_2._0_tutorial_franais.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/davixoligiwonosenu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/biology_11_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/lesatajesurijoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/94351044712.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/67247333165.pdf
    • https://cdn.shopify.com/s/files/1/0438/5059/6512/files/26405194252.pdf
    • https://cdn.shopify.com/s/files/1/0447/2664/8985/files/lowes_mccomb_ms.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/79761291833.pdf
    • https://cdn.shopify.com/s/files/1/0439/5443/8302/files/fuvaxivimozodurapubapikaz.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_off0000c7a2.bin
bdf552d8ed5a94ef09b167f4a5dd9ba18cae715c7101fe4304cd8dac066f795d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A2 5092 bytes
font_01_sfnt_off0000d8cb.bin
b1dc73bbd42cb053af43bbb6afe6044e789668fa72cee8a1d56dc8a8547cd2c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CB 10424 bytes