Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba44dad0fe356455…

MALICIOUS

PDF

44.6 KB Created: 2020-08-14 04:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aa6b3e4d8a9a9a3dc76f3b863d5a6de SHA-1: 8718afd9620a769f3d5000187c679be5caf6724f SHA-256: ba44dad0fe3564558f2ae49321c87b14212783e6e07222f9ce99a5533a3241da
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this is a link farm designed to direct users to malicious infrastructure. No scripts were extracted from this sample, but the extensive link farm suggests a delivery mechanism for further malicious content or phishing lures.

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=comprar+vidrio+liquido+para+manualidades
    • http://files.wandagillespie.com/uploads/1/3/0/7/130738876/pepililidev.pdf
    • http://xiboza.emergefoundation.net/uploads/1/3/0/7/130739206/300863e2cd94.pdf
    • http://files.singleparents.co.nz/uploads/1/3/1/4/131407709/fuwaweleveda_nikalumezu.pdf
    • http://files.sydneynewhorizons.org/uploads/1/3/2/7/132710787/lozaratorepu_tatira.pdf
    • https://cdn.shopify.com/s/files/1/0435/5974/7745/files/99970788516.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/homeostasis_of_blood_glucose.pdf
    • https://cdn.shopify.com/s/files/1/0435/0912/1184/files/joforarokati.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/vimajavules.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4182/files/4008048102.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1723/files/functions_of_computer_system.pdf
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/642378549.pdf
    • https://cdn.shopify.com/s/files/1/0427/4873/9740/files/71131811000.pdf
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/19086640611.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/20983538524.pdf
    • https://cdn.shopify.com/s/files/1/0440/1129/0782/files/30459187582.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/b._p._ed_syllabus_2020.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_off00006276.bin
fc48b7fc262e71c0b71ba22718ad8df450621ebf81a84b524ec779cc03292219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 5196 bytes
font_01_sfnt_off00007402.bin
8486869b90493e69e2a9598c8f0f3ca7a5b65e258600cf75a46bb17bf695129a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7402 15544 bytes

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