Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a7eacecd036a92…

MALICIOUS

PDF

38.9 KB Created: 2020-08-21 00:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c47dfbec3a400fdeaa285e2ea666c751 SHA-1: 8fc6beab6c074dfe600173add228f16c59f26525 SHA-256: 32a7eacecd036a926249b46460995ede71dba08cb59cf932d47d839513ab1c45
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=duet+anjali+anjali+song+free'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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=duet+anjali+anjali+song+free
    • http://siruj.nicolahyslop.com/uploads/1/3/2/6/132695569/4d60d912993c.pdf
    • http://ripuxoz.district4trials.org/uploads/1/3/2/3/132303382/wifuseramilire.pdf
    • http://files.bialigy.com/uploads/1/3/2/3/132302924/4762583.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/18279556128.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/serulizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9585/files/kudumejasaxukaredufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5265/files/22971823703.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/42719320548.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1442/files/nixodotikonogan.pdf
    • https://cdn.shopify.com/s/files/1/0429/0091/4343/files/15922979757.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/12900347688.pdf
    • https://cdn.shopify.com/s/files/1/0438/5072/7584/files/56315270222.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_off00004ce1.bin
491aaa94f1ff15af171640edd6d77f245418352ce31aad9b9eb5d5e8d61353e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE1 5008 bytes
font_01_sfnt_off00005e0d.bin
4eb548ce67a2e0ba7b785ebdbd35f0f873d1d17dd1b91f3a5915b1fb318771a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0D 15580 bytes

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