Malicious PDF — malware analysis report

Static analysis result for SHA-256 532dbd7d95d8f4f5…

MALICIOUS

PDF

45.3 KB Created: 2020-08-24 16:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d88ed81fbf3bc4996c92d0be1900fc9 SHA-1: 793136106bed2cbdba5efc126a9364161a41de9c SHA-256: 532dbd7d95d8f4f5dfbc431aed5b92d12622986da83b9d7c9d6721d108c41d72
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=ishikawa+diagram+templates'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a lure to a malicious site.

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.ru/pify?keyword=ishikawa+diagram+templates
    • http://files.clairehinchman.com/uploads/1/3/0/7/130775866/dd6299.pdf
    • http://files.westportholidayhomes.com/uploads/1/3/2/7/132712251/89528.pdf
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/wokatexujowafow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/51849807953.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/96087739315.pdf
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/adobe_reader_free_download_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/25805588648.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/fixed_assets_register_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0434/8215/3112/files/mixexobezipepupug.pdf
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/aardvark_i2c_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/election_card_gujarat_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/vusatu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/28987553745.pdf
    • https://cdn.shopify.com/s/files/1/0454/7074/4742/files/escape_the_ayuwoki_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/supuxadukoparike.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_off00007331.bin
34d7e406e95c4503aa5aec145f74a6a2b42d139689fad4a52ca7423f563e8ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 5464 bytes
font_01_sfnt_off000085b0.bin
b5fdaed466e46d0aefdab19b073cb53c368cd93486d51f5811bc9662cb6a4adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B0 10316 bytes

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