Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0227cd39fbd3ba…

MALICIOUS

PDF

46.2 KB Created: 2020-08-19 00:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f02a28de8088786817446e80e1e8606 SHA-1: 6b95f1874374308ce81e40f9ab9f3cc525801e58 SHA-256: 9a0227cd39fbd3ba606781706adb30b98cff3b86cc3b9e8846a7faccbe44a714
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The primary malicious link, https://ttraff.com/pify?keyword=android+ndk+eclipse+tutorial, suggests a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, reinforcing the attack pattern of a link farm designed to redirect users to 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.com/pify?keyword=android+ndk+eclipse+tutorial
    • http://files.blubocker.com/uploads/1/3/1/3/131381612/nisijalugilazaz.pdf
    • http://wabozire.croccondos.com/uploads/1/3/1/0/131070588/lelanuni.pdf
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/dark_souls_2_server_status.pdf
    • https://cdn.shopify.com/s/files/1/0438/2998/5430/files/beranigiwinunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/tutesexevigevaxiwugid.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/mumedujodefamurupefe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1416/files/liver_function_in_digestive_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/9695/7343/files/44900531894.pdf
    • https://cdn.shopify.com/s/files/1/0437/0006/0310/files/63791408437.pdf
    • https://cdn.shopify.com/s/files/1/0434/8031/8118/files/free_download_for_editing_documents.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6231/files/crosswords_with_friends_answers_4_10_19.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/37965469475.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006651.bin
c98812d75b70b984a7276cacec24fc0338063209d811b5ece48356be9775c0c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6651 5000 bytes
font_01_sfnt_off00007751.bin
16c3c8291d660f5ec92e00d4e68474d334b174c00d1201d2aa47a8445f1df818		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7751 11304 bytes
font_02_sfnt_off00009ddf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DDF 4324 bytes

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