Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c19896794ace4d…

MALICIOUS

PDF

46.3 KB Created: 2020-08-31 14:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c802155d78d7b111004b4ff65326872 SHA-1: 129b720f5af54da93f5e20cae4470bc73c9cca86 SHA-256: a0c19896794ace4d08fa138997aace91e3f919c4e7ba94378e510bccb388e7f9
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for distributing malware or phishing pages. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it's the primary lure. The PDF also contains a large number of links to Shopify-hosted PDFs, likely part of a link farm to improve search engine ranking for malicious content.

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/wix?keyword=how+to+calculate+datediff+in+crystal+report
    • https://cdn.shopify.com/s/files/1/0460/5643/9963/files/xaxalu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/jalur_metabolisme_lemak.pdf
    • https://cdn.shopify.com/s/files/1/0436/0758/9027/files/nuvijerujafivomeladunov.pdf
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/bluetooth_low_energy_android_tablet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/calculus_with_analytic_geometry_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9735/files/92643335744.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/20055929634.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fd0a6254a624316afc839a0cfb07ffb.pdf
    • https://static.usrfiles.com/ugd/5ed537_a1f316d694534444b038d1821c4e78cd.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/xesisanebuvoro.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/belajar_membaca_tanpa_mengeja.pdf
    • https://cdn.shopify.com/s/files/1/0434/8900/1638/files/lixewekerotig.pdf
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/minecraft_64_bit_java.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_off000067f5.bin
2cd69d5ceb4b20cd1bfc0e091b951ab71b1ab7ce268a10b14b0030343563f4fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F5 5304 bytes
font_01_sfnt_off00007a2b.bin
a226ccc29fb4b601620930cf0b0ec8e191d197bd5e9d113474a9f0bf841d8f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2B 16204 bytes

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