Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4dff92196c837fd…

MALICIOUS

PDF

35.1 KB Created: 2020-08-19 21:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b31d0af8c5021cce9bc6317975b79b1 SHA-1: 36668f1ab3444aedcc2a8c1fc45423cf1bb09e33 SHA-256: a4dff92196c837fd16499c75d7f59a2669340fa8efff32f8fba4da9da5841ebe
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, a technique often used for SEO spam or to distribute malicious content. One of the extracted URLs, 'https://ttraff.com/pify?keyword=balupu+telugu+hd+movie', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The presence of numerous other links, many pointing to Shopify domains, further supports the idea of a link farm designed to attract unsuspecting users.

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=balupu+telugu+hd+movie
    • http://gidalofi.goodbraintherapy.com/uploads/1/3/0/7/130776485/xigubewo_woleronutakofe_diwika.pdf
    • http://gaxoxo.gcmafproducts.com/uploads/1/3/2/6/132681464/lazapu-xonolojul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0438/4145/4240/files/16260542971.pdf
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/sworn_statement_example.pdf
    • https://cdn.shopify.com/s/files/1/0436/5356/2526/files/2558015356.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/62519347804.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/android_ndk_get_data_directory.pdf
    • https://cdn.shopify.com/s/files/1/0434/6272/1688/files/factorio_12_to_12_balancer.pdf
    • https://cdn.shopify.com/s/files/1/0437/5108/0090/files/15921084493.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/wizubulimoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/93142068361.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/38186844038.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_off00004b3e.bin
9fbfafe76b5e319a5cc7f7de42a6e0ea43ca19545de1e404348a9e175b908eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3E 5208 bytes
font_01_sfnt_off00005cde.bin
e56b55e2347fd688549e140a4bd8fba8a267779556f327ba2f7105fe038dd073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDE 10124 bytes

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