Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8078499e514971a…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 21:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03762ecbf399d77dbf1d12ce92fb9a3d SHA-1: ca70feadf0ff4f04a3164a225f44a0706d756519 SHA-256: b8078499e514971a722750cd95c5c079b43f8c2bde6b0d4ebfd5138a204fd68a
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=isilon+h500+hardware+guide, which is likely used to obscure the final destination. The document body itself is heavily obfuscated and contains the malicious URL, suggesting a lure to download further malicious content.

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=isilon+h500+hardware+guide
    • http://files.victorheritagesociety.com/uploads/1/3/0/8/130874652/3576439.pdf
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/xesavafeni.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/xasuxegig.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/jipidavimalefajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/kewadukal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mejiwevabefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/32289766117.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/95544393283.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/32020610097.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/didavukigomug.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/pafumuxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/kazupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/53257285545.pdf
    • https://cdn.shopify.com/s/files/1/0439/1541/1608/files/35016318145.pdf
    • https://cdn.shopify.com/s/files/1/0431/8992/8096/files/directing_ecological_succession.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_off0000653b.bin
4fbfba913cdf29611459b7efab5d738a8239767e89c225f938b48585b62aa191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653B 5384 bytes
font_01_sfnt_off0000778a.bin
6115a858d3987c2e2c7b146e3fb69b93fe684be7b6f4a7c3ef3404126b60c1ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778A 10428 bytes

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