Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a28a93f008ac34…

MALICIOUS

PDF

42.7 KB Created: 2020-08-25 03:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97981cec9e0e222f6daf04133b406be4 SHA-1: acea66739110f15f5046bbec573fcd4f139fc4fe SHA-256: c5a28a93f008ac3415a49dc0ae7a4bb3cb2ee019d6bc628b02e0242bf49b911c
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, indicating a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=christian+devotional+songs++tamil, which is likely used to redirect users to a malicious site. The document body contains garbled text but also includes the same suspicious URL and several Shopify-hosted PDF links, some of which are confirmed benign while others are unknown.

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.cc/pify?keyword=christian+devotional+songs++tamil
    • http://files.thehearthosaka.com/uploads/1/3/1/0/131070452/wixufava.pdf
    • http://files.jandgguns.com/uploads/1/3/0/8/130813841/b35a696c1a9dc0e.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/dewerimejax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30106301206.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/mods_for_minecraft_on_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/fitekebasapegene.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/83053636408.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7169/files/kizol.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/fegeli.pdf
    • https://cdn.shopify.com/s/files/1/0441/0333/6088/files/cuisinart_ice_cream_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/67123212957.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_off0000607b.bin
809aca9c9981babcc073139d103e53fb080c804b1deed0f23ec965c573e52098		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 5204 bytes
font_01_sfnt_off00007204.bin
ecc6897743a20fbdff32abe3e936b85d6f67c5c4c8b9f1c5efc1b74a87294660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7204 13860 bytes

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