Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24919799e8bb62b…

MALICIOUS

PDF

57.9 KB Created: 2020-08-08 20:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4d4c06509e423783ea08157d79a88ec SHA-1: 88673c6a00ad36feebc28ce1464b208a9239c145 SHA-256: d24919799e8bb62b2703e145d5a87815fa9356e70f52bffab62e965d67b816da
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with one pointing to a known malicious redirector. This suggests the document is designed to lure users to malicious websites. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of specific behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=antigone+de+jean+anouilh+pdf
    • http://files.northernwhaleband.com/uploads/1/3/1/1/131163851/lafefodosi_morakakedepuj_bejabetug.pdf
    • http://files.livebettertherapeuticservices.com/uploads/1/3/1/1/131164425/nerowagot-setikuwuvageg-mixejet-jidegulutajux.pdf
    • http://files.mrcoop.org/uploads/1/3/1/4/131437680/8aeb58d626ecda.pdf
    • http://files.petermcdonnellwriter.com/uploads/1/3/1/6/131606366/fudavusuxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/journal_and_ledger_entries_of_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/78535090918.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/dovupujofix.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/batch_file_commands_list_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3768/files/wudosakajajibisenofegewal.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/footaction_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/33941667969.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/44180805380.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/88340601725.pdf
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/75861499479.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e06.bin
2d7dc799421d32c9f7b6d2195e75b692b97646e211cffc2c674eb4ef951a5133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E06 4976 bytes
font_01_sfnt_off00008eec.bin
79ba2a75b07bbab57120f0dbbda41a14ee5959f4d9bc6596213a0d5fd4a6ea31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEC 1928 bytes
font_02_sfnt_off0000981f.bin
c4ac2bdfe62e416fc89cba711b87244fb7546e7e19d2a6bcad4fe9aad4488fb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x981F 17916 bytes
font_03_sfnt_off0000cc2c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2C 4324 bytes

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