Malicious PDF — malware analysis report

Static analysis result for SHA-256 b973c1a22a3150f6…

MALICIOUS

PDF

49.9 KB Created: 2020-07-30 13:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae2602de2b66104bcf18d180a81d6914 SHA-1: 562a173b0327d476d1a05cbc78e6403f0967efac SHA-256: b973c1a22a3150f6110f5e2fb7500c5f036cadff411c0fd1a6002b2431189c4d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. Another critical heuristic identifies a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=exercice+barycentre+seconde+s+pdf
    • http://files.jesscontileathergoods.com/uploads/1/3/1/0/131069899/8142475.pdf
    • http://files.hawksdrama.com/uploads/1/3/1/4/131438786/089dfc9ea9d18f.pdf
    • http://files.digitaltogrow.com/uploads/1/3/2/6/132682153/6570747.pdf
    • https://cdn.shopify.com/s/files/1/0432/5277/7128/files/bulapakugek.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/pusamipefenadom.pdf
    • https://cdn.shopify.com/s/files/1/0434/9050/8960/files/65033545587.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/sirokawede.pdf
    • https://cdn.shopify.com/s/files/1/0431/2743/9526/files/luvabemetepaba.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/suwesepopefalatizawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevimofurerofujasopam.pdf
    • https://cdn.shopify.com/s/files/1/0435/4025/0775/files/38092659074.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tokisesuzarutaxiwiru.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8872/files/namakekibazus.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/zegiwezatinegevopug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1676/files/bajomixe.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_off000081a5.bin
e9874e24fe443c4d7ca0f73dd71f264b92040b819be6a63cb8da898b47f8d6cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A5 5172 bytes
font_01_sfnt_off00009344.bin
fa6f423b5bc57e46d4cc07fde663f272c14960d3eb03bb219cccc218c774830c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9344 11708 bytes

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