Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7721a2a3ce448f4…

MALICIOUS

PDF

47.7 KB Created: 2020-08-05 22:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6becde328ad98566c69db177e108fde3 SHA-1: 36765d355303dc090bc5d66a0dbd768fa7dd35f5 SHA-256: a7721a2a3ce448f4d631608d8b16414f498941c4f35379ae9fe2ac240c40d372
120 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.ru, disguised as IELTS speaking test materials. This indicates a phishing or scam attempt. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to distribute malicious content. The document body itself is heavily obfuscated but contains the malicious URL.

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=ielts+speaking+questions+part+2+with+answers+pdf
    • http://files.prescottchorus.com/uploads/1/3/1/3/131379699/913053.pdf
    • http://files.hidesertfringe.org/uploads/1/3/0/7/130739906/rixajufalex.pdf
    • http://files.paolarecipes.com/uploads/1/3/1/0/131070374/kodagosopema_kedovoko_kolavoxal_fuvavep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6022/files/73415847342.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7283/files/wesibelobodin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65760981278.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/wovirenajifeneri.pdf
    • https://cdn.shopify.com/s/files/1/0431/5634/0890/files/26208763321.pdf
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/kamaweworajujatob.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/samsung_rfg298hdrs_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/90253373125.pdf
    • https://cdn.shopify.com/s/files/1/0437/4488/6936/files/chemistry_lab_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/kokokuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/wugena.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/31028829711.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/1/0432/7473/1685/files/wovirenajifeneri.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007638.bin
deb71ac208f9fee2143cd41b94197aaf2b9d4a2ef32b74ba400efcc6edad1077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7638 5652 bytes
font_01_sfnt_off0000897a.bin
5ca763fdc91f84100055f356cc3e054bc0a6526ac97401989a3d2f441e3a678e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x897A 14360 bytes

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