Malicious PDF — malware analysis report

Static analysis result for SHA-256 82396d2f4dc9329f…

MALICIOUS

PDF

42.4 KB Created: 2020-08-21 12:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bef9a57a137d77c6c6e9978f225e4e09 SHA-1: 114153dcf7bc200cb9b5e60f79000e3055484b97 SHA-256: 82396d2f4dc9329f31bab0dbd25ed4f9d3fbc13db5c041a6e2c9fed1aa00ca3c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=bsf+bharti+online+form+2019'. This URL is presented within the document body, disguised as a form submission. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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=bsf+bharti+online+form+2019
    • http://jozilipa.leonardpaul.com/uploads/1/3/1/0/131070722/ef7e7945b069.pdf
    • https://cdn.shopify.com/s/files/1/0448/3593/0273/files/zuvofoxoximasur.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/fazonupuzavomenek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/fotanejuzige.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/49279627138.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/assembler_des_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/43602495737.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/4842234279.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/levazovafesasupaviwafiz.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/
    • https://cdn.shopify.com/s/files/1/0431/4886/978

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dcd.bin
e7d675ba04bf7731548b5932ee1bcf68d61f06289e35584a16c668582bc518e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCD 5680 bytes
font_01_sfnt_off000070ee.bin
05427d8ba9f79d752804e33592506176cd6ea5a911c3365913d311d0236a2b0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70EE 14316 bytes

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