Malicious PDF — malware analysis report

Static analysis result for SHA-256 86395b58f0eeb359…

MALICIOUS

PDF

34.1 KB Created: 2020-08-16 23:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8333e3907d4d79f3c266a05f9989d519 SHA-1: 72e3a4fcd81e9e289406c7cdfcf422f10fa96f00 SHA-256: 86395b58f0eeb35978b583d4c3b9fb837a5dfe6ae06036e1b45e92d876fd8907
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL and a reference to 'chilasow video songs', suggesting a lure. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, which are likely part of a link farm to improve search engine ranking for malicious content.

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=chilasow+video+songs
    • http://files.buildingboxes.co.nz/uploads/1/3/1/3/131384636/2384892.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/wodikatataridib.pdf
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/10860176297.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4839/files/dididanodonisepesereto.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9944/files/canara_bank_account_statement_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/gifowozux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/foodborne_pathogenic_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/une_alimentation_saine_et_quilibre.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8933/files/77453291443.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/47059353819.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/adobe_illustrator_to_vector.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0709/files/lulizusarosalawodop.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_off000049b7.bin
7db535e2692a9f09c65e7dce8c9e133b6ef56ce37482cf4fee58fd2766225ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49B7 5048 bytes
font_01_sfnt_off00005af0.bin
a28769cdc033b483bfa1a2744e6655e621246e3dc8bafe1b91649ab25ff419d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF0 9812 bytes

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