Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60b9d7b65791b66…

MALICIOUS

PDF

38.6 KB Created: 2020-09-16 19:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af0ec5623f2b00d7d4f44a60d3ef7a64 SHA-1: 394723a93f5673dc366f89a56eade8653e31982a SHA-256: e60b9d7b65791b664b5fc789bf57e4f855bc24d87c0dee7eb1524431c7fe4423
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a worksheet, aiming to trick users into clicking it. The ML classifier strongly supports maliciousness. The embedded URL `https://ttraff.me/wix?keyword=trig+review+worksheet+pdf` is the primary indicator of malicious intent, likely leading to further compromise.

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.me/wix?keyword=trig+review+worksheet+pdf
    • https://cdn.shopify.com/s/files/1/0436/2135/1587/files/icar_answer_key_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0465/5493/9542/files/mojanexilesefugepeturefiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/asset_management_decision.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/nice_guidelines_perioperative_management_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8903/files/23690986381.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6198/files/types_of_bill_of_lading_in_shipping.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/civil_service_medical_certificate_form_41.pdf
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/sikidefo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3649/1431/files/airscreen_apk_1._8._8.pdf
    • https://c3f274b6-26a9-4a67-98a1-078f001dcb8e.filesusr.com/ugd/43d2fc_a9279f5c567b42869bb66dc201662dbf.pdf?index=true
    • https://05147c5a-db15-4767-9189-b493e29319d9.filesusr.com/ugd/4b874d_6daff21b76ca4f16910c0dff827c9b83.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/2041/7181/files/watch_men_in_black_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/msvcp140._dll_missing_windows_10_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/drugs_acting_on_autonomic_nervous_system_pdf.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_off000059da.bin
78b25bdabade20395e2429c6739d186181dde3a93d185c098ea8349cb9ba2e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DA 5228 bytes
font_01_sfnt_off00006bc0.bin
6c3d463a1b8dcf1dfd68ad8d4c8aa322bf00f528ce47a3cd3ba9ddb3c9822b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC0 10008 bytes

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