Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22ab7b13cea21cd…

MALICIOUS

PDF

38.1 KB Created: 2020-08-04 00:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bf9501f773b7699a022d2e1c638ae30 SHA-1: 6370fc2d882bb974f11b6c573e0a681dc174ea97 SHA-256: b22ab7b13cea21cd4a5c4e0a60b91c5edd709f3ed57e038dd9d5b61c9bf28697
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=solving+equations+worksheet+algebra+2+pdf, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to educational materials, suggesting a lure to disguise the malicious intent. The presence of many links to Shopify domains, some confirmed benign, suggests an attempt to blend in with legitimate 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=solving+equations+worksheet+algebra+2+pdf
    • http://files.mtzinsurance.com/uploads/1/3/1/3/131383384/b68ff563c58c344.pdf
    • http://files.astleychurch.org/uploads/1/3/1/8/131857465/xemenumewud-piwiwog.pdf
    • http://files.woodside2-3-4hoa.org/uploads/1/3/1/6/131606206/6ffae453423.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/lulodamekugojakajurumow.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/53431439284.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2264/files/25191298566.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/dibop.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/98654926963.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/9924208990.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/xebusariwomudemova.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/numaderitunijemavamofol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/vamupelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5473/5264/files/fezixojifir.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2984/files/sagesijowukawiwosupegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4583/1335/files/gojuguxoxodij.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_off00005615.bin
d3e02c17028f8fc8f63b0a70436f8dcecda2346cadf12106c7c6085c58d299dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5615 6020 bytes
font_01_sfnt_off00006a99.bin
093cb79db1e3bcb0df16abd2d315961550c65695862d1fb608e16cb7c2c5980b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A99 9644 bytes

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