Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e725b7540ed44b…

MALICIOUS

PDF

45.2 KB Created: 2020-08-05 13:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b35d051b640e6fcbfbd7033951642c6e SHA-1: ad8eaf0a58e7791e57ca80aefd5d8a4ddfcfeece SHA-256: 97e725b7540ed44b928f0067f68dca0ce99ac8fbea2d8ea45f2f501fb0c84209
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=boundary+scan+description+language+pdf. The document body is heavily obfuscated and appears to be a lure, likely to trick users into clicking the malicious links. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic.

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.cc/pify?keyword=boundary+scan+description+language+pdf
    • http://files.landscapeequipmentrentals.com/uploads/1/3/1/4/131455198/8969054.pdf
    • http://files.hinsdaleracquetgang.com/uploads/1/3/1/6/131637108/7521677.pdf
    • http://files.sluadg.com/uploads/1/3/0/7/130739835/fofix.pdf
    • http://timeweg.meacorsigns.com/uploads/1/3/1/4/131407406/xubiwozezaxesub.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/60520440166.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6967/files/nuzomutinowaledapo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1607/4902/files/jugazalepuvibodazimipomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/polij.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/65119359958.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9816/files/zajisimutevanajaloxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/sap_hana_training_materials.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7445/files/baloripewosawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/91842639121.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/90745731124.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/conceptual_physics_12th_edition_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0448/6037/5201/files/briggs_and_stratton_parts_by_serial_number.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_off00007039.bin
c3ed2666cfdd7bd79583f0c76ac9094bf8d8605a4609a295bb2c4d5936fc5d85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 5476 bytes
font_01_sfnt_off000082f5.bin
af7810f2708b1438de29027b4cd6f31c7d6cfbe70000d503c8a98e6e800c6e7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F5 10692 bytes

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