Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf05267db97eda0c…

MALICIOUS

PDF

41.5 KB Created: 2020-08-11 23:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f931e9a161db7f50483fa769d340dcd SHA-1: a6499faf763d26e7dc43663700f45e7653b7d56a SHA-256: bf05267db97eda0c299b7ff88c030926591c4cd0281a2e9f9f7d04ac63783f69
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary malicious redirector URL being https://ttraff.ru/pify?keyword=calendar+aptitude+tricks+pdf. This indicates a phishing or scam attempt designed to lead users to malicious infrastructure. 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=calendar+aptitude+tricks+pdf
    • http://files.constructionqualitycouncil.org/uploads/1/3/1/8/131856492/xabaxukavorol.pdf
    • http://files.larasanusi.com/uploads/1/3/0/8/130873872/sapinibajirudujite.pdf
    • http://files.ipads4teaching.net/uploads/1/3/2/8/132814898/worawexisaxewen-gedofasisuwenu-febumezelob-rolokadexobuzop.pdf
    • http://files.megangarbe.com/uploads/1/3/1/4/131455463/d44157e.pdf
    • http://wovude.ojmfarmcontractors.co.uk/uploads/1/3/1/4/131483254/656914.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/94179974089.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7130/files/riwurogepamunuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/daxol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/jorademo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2913/4487/files/fifumidataxupum.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/jatuponisilijabopewedaf.pdf
    • https://cdn.shopify.com/s/files/1/0447/2363/4330/files/clinical_chemistry_and_laboratory_medicine_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/jabijopupovuliwenevez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/demajez.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/25393618870.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/gikaxedu.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_off000065f4.bin
9ec2bfab41271631c22d556f1bc3ce69a2b4f3120020f0817ccc50e6f3fa686e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F4 5120 bytes
font_01_sfnt_off0000776c.bin
b2eb4540f47dae94b53a858a01f8021426c1c19719c6599b25433bd4d6799575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776C 10052 bytes

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