Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7672ea61c41e92…

MALICIOUS

PDF

49.2 KB Created: 2020-08-30 12:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad525c658e847dd6ed573a92679e9875 SHA-1: 0af33238ba9108809d2ce8444fde5f9fb8dc1b9b SHA-256: 3d7672ea61c41e92b2a16e9ad7b3961a13446d286005bab1181a4771b6ef0e5c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=the+city+of+mirrors+epub', is likely intended to lead the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded links, suggesting a broader campaign to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=the+city+of+mirrors+epub
    • https://cdn.shopify.com/s/files/1/0434/2480/9116/files/router_booting_process.pdf
    • https://cdn.shopify.com/s/files/1/0461/9704/7447/files/aprenda_a_desenhar_livro.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/76691823809.pdf
    • https://cdn.shopify.com/s/files/1/0435/8547/0627/files/43454557745.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/todo_sobre_el_bullying_escolar.pdf
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/fopelabafazuravovamepow.pdf
    • https://cdn.shopify.com/s/files/1/0440/7725/2760/files/41851592615.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/wumolafenozup.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/26297222939.pdf
    • https://cdn.shopify.com/s/files/1/0461/9999/6569/files/barzanji_ala_mandailing.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/64295971784.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/java_code_conventions.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/bisunefukikiwiziviz.pdf
    • https://static.usrfiles.com/ugd/49be48_066e408c4a574810befe071946fc3d9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a86d91661e1c4b0799e907e1ff31fb36.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_off0000840e.bin
21f376ba3c85702fddabd999ba9072d017bea8037418c338816be864bca8e05a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840E 5204 bytes
font_01_sfnt_off000095a5.bin
7844bb15dcab1cf3eedae512f412f854df604137e5d0182f53f4c32597950e99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A5 10144 bytes

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