Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8b5b5d22134418…

MALICIOUS

PDF

38.8 KB Created: 2020-08-18 22:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1a07f1c63ee6134731a85a6dff87591 SHA-1: 482ffafd98fb7137565c49490dff954bd0c4dbf8 SHA-256: ab8b5b5d22134418db10b6bd0db0ba00235c741cc993239dfe340f214a79a222
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a movie theme music download. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm pointing to various Shopify-hosted PDFs, likely for SEO poisoning or to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=kaththi+movie+villain+theme+music+free
    • http://vapiwo.qicultivation.com/uploads/1/3/1/3/131380005/84689488.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/xawufido.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7992/files/96843421964.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/jojokaledipelije.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/7750174329.pdf
    • https://cdn.shopify.com/s/files/1/0447/9716/5728/files/the_accidental_prime_minister_book_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/business_driven_information_systems_6th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/how_to_charge_a_flip_video_camera.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/77609097949.pdf
    • https://cdn.shopify.com/s/files/1/0454/2195/3192/files/taxevexewafesugozurisivag.pdf
    • https://cdn.shopify.com/s/files/1/0450/5042/9598/files/cbc_blood_test_normal_values_chart.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_off00004e33.bin
b99cf31acd208a7c3afd5cfa595c51cc37562302b2c8586a531f4d662fa3cb77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E33 5148 bytes
font_01_sfnt_off00005fa0.bin
aa4733b421ae4b409b93115be28a6a8bdc7df036ba3ae44a67b75ee8c5636be7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA0 14456 bytes

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