Malicious PDF — malware analysis report

Static analysis result for SHA-256 be084dea659e1cef…

MALICIOUS

PDF

47.2 KB Created: 2020-07-31 01:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d6721962054a65c44f9a68379f0c8bb SHA-1: 743f154136cbac8a0dd927cd6cb08b2f9ebb6f71 SHA-256: be084dea659e1cef7888e7343b77ffb24ad2f6e276843aa0011c83ef058bf642
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm designed to manipulate search engine results or distribute malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=business+email+etiquette+examples+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to be related to business email etiquette, serving as a lure for the malicious links.

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=business+email+etiquette+examples+pdf
    • http://files.teachermrho.com/uploads/1/3/0/9/130969473/7019de66.pdf
    • http://files.krisrunstheplanet.org/uploads/1/3/1/4/131452961/2261247.pdf
    • http://files.pauladuartetango.com/uploads/1/3/1/6/131607027/8499225.pdf
    • http://files.thedanceacademyofbarrie.com/uploads/1/3/0/7/130740298/3979023.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1416/files/97197780596.pdf
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/didisobogenopezije.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/77199127920.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80170273674.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/88594191060.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/45393388859.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4589/files/rivosusanadadikiriv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/wimisomara.pdf
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/tunazomilin.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/xifaleritadimulujipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/xivimasakanu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6342/files/48273471775.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_off00007c17.bin
2f63e24dc945fe8266ff5cb9dcad24ce4d8547619178cf5b2b1cea9aa9cd848b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C17 5104 bytes
font_01_sfnt_off00008d55.bin
aa42412abf35d89ac448a11bb53e35a5041b81ae8d8071d9536058a16dad25d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D55 9880 bytes

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