Malicious PDF — malware analysis report

Static analysis result for SHA-256 496d8799795e4e38…

MALICIOUS

PDF

44.8 KB Created: 2020-08-09 20:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 728741a29f8432dde5e3478fd7747550 SHA-1: d8fb2cebfd576a031e3c2ac20ec5b10cfccafb9f SHA-256: 496d8799795e4e38b9c6cc6f71488bcf8a52945a433011c18dd79bfda9d2801e
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to the URL's keyword and the wkhtmltopdf generator, suggesting a SEO-based lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further 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.ru/pify?keyword=balance+de+materia+con+reaccion+quimica+ejercicios+resueltos+pdf
    • http://files.mikezichellaart.com/uploads/1/3/2/6/132680933/kopudejam.pdf
    • http://files.wildemberstudio.com/uploads/1/3/1/8/131871614/novesuredi.pdf
    • http://files.tangiblegreen.net/uploads/1/3/0/8/130813906/a704693c88.pdf
    • http://files.southbaygymkhanaseries.com/uploads/1/3/1/6/131636689/famapeliwasuber.pdf
    • http://files.irishrockboers.com/uploads/1/3/1/6/131637037/kibapamumanugut.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4108/files/xetakokuputiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/property_and_casualty_insurance_study_guide_texas.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/92239423158.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/64195251110.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/zifuxaxuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/wotlk_cooking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/rikafozunikazam.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/dedodibezupufema.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/ham_test_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/vanawaxife.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/49643311601.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pawatofamilafal.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_off00006d08.bin
bd71ff284c08a1f9c3fd179f53b9dc1ad4c375e351821374f37463ffcee40262		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D08 5552 bytes
font_01_sfnt_off00007fd3.bin
0ba36e1eb3b51fc01c8c1a82a96b2a24cf19c528e7bce67a6fd58728bb41bbd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD3 11024 bytes

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