Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c971f3ab2fdee3f…

MALICIOUS

PDF

44.3 KB Created: 2020-08-04 08:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 546bd5351b9a208c160667c05d9dcd67 SHA-1: 3c76b8c629ca533771e9cb86c8f91eea0c659728 SHA-256: 4c971f3ab2fdee3fdb4dd385f29408ce867399580844b383b1f5dca4ee4b6049
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=altera%25C3%25A7%25C3%25B5es+cromossomicas+numericas+e+estruturais+pdf'. This indicates an attempt to lure users to a malicious site. Additionally, a PDF link farm heuristic suggests the document is designed to host numerous external links, likely for SEO poisoning or to distribute malicious content. The document body contains obfuscated text and embedded URLs, further supporting the malicious redirector attack pattern.

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/pify?keyword=altera%25C3%25A7%25C3%25B5es+cromossomicas+numericas+e+estruturais+pdf
    • http://files.willowshealingpath.com/uploads/1/3/2/7/132740270/silivaligufofuzudi.pdf
    • http://perujofez.institutebnh.com/uploads/1/3/0/8/130874064/lixekuzog.pdf
    • http://files.recambiosmecaelectric.com/uploads/1/3/0/7/130775350/9a93b6d91b390b.pdf
    • https://cdn.shopify.com/s/files/1/0437/7778/6018/files/losivorosek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/zopunikopigizubapibaxuvan.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/tensorflow_build_from_source.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/dinutavemufedana.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/hawaii_driver_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/340172381.pdf
    • https://cdn.shopify.com/s/files/1/0433/6317/2502/files/what_are_the_forms_of_leer.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/tuwape.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/82758027876.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/21166826193.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_off00006803.bin
722777dbc3a58e987a6c0393b7d6bc709f2a159a9dbe49096ae7f83e7096e43b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6803 5688 bytes
font_01_sfnt_off00007abf.bin
447c5606457bcd9321898abb87002895b0fe722edf7095f6303ef582e2842ca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABF 12720 bytes

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