Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cc11543ce79702…

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 22:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf50e805bff00fe34d3dc8cceb533123 SHA-1: 738b1b14b6816a8a3c467519e72398db2253199a SHA-256: 24cc11543ce79702304484145e115f47a289d1d5f6b10fecb2738dd579658d18
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=candy+crush+saga+app+store', suggesting a lure to a malicious site. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a dangerous redirector.

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=candy+crush+saga+app+store
    • http://files.virusstrategy.com/uploads/1/3/0/7/130776864/6007699.pdf
    • http://files.springcreekranchclublambs.com/uploads/1/3/1/4/131409200/453d2ca.pdf
    • http://files.biggs-group.com/uploads/1/3/0/7/130776499/2194151.pdf
    • http://files.cavanaughcoastalcoaching.com/uploads/1/3/1/0/131070820/88266.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/chocobo_racing_ps4.pdf
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/58412646649.pdf
    • https://cdn.shopify.com/s/files/1/0432/8508/6364/files/a_light_year_is_approximately_answers._com.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/13713917223.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/56432780456.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/goldfish_buying_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5025/files/81892092800.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/kujefitetelokikexakofowol.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/star_wars_1080p_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0435/3232/0917/files/worry-_free_business_security_services.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/48356927376.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8807/files/62390860047.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_off00006584.bin
9a1ab0a9a92ee2bcc54aec469dd3b9d96c7edf13062230fe70cdf3e9670f1e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6584 5312 bytes
font_01_sfnt_off00007790.bin
c6b1613cb3f98e2a1b496dcdab523ac97870ea31b7bffdc360693660c4304a1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7790 10780 bytes

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