Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7d94d4e0935dc2…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 04:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6424f1577abac3975ba26c77731e962c SHA-1: 2b9590ab1c3444c98f6fe0c7064c123e270b083c SHA-256: 1a7d94d4e0935dc21fdceadacd972795061e09a1f757c48575eaf42aeec86e69
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though partially corrupted, includes the text 'Ninja star origami instructions' and the malicious URL, suggesting a lure to a site that likely hosts further malicious content. The presence of numerous Shopify links, while mostly benign, is characteristic of SEO link farms used to obscure malicious activity.

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=ninja+star+origami+instructions
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/96169427437.pdf
    • https://cdn.shopify.com/s/files/1/0454/7484/0742/files/nursery_rhymes_kid_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/37171196570.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/list_of_borrowed_words_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/manual_actualizado_de_cateterismo_cardiaco_derecho.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ba1575a95e042ae8e625d3dd533067c.pdf
    • https://static.usrfiles.com/ugd/98857b_0015aee07f46497e8eeeecb28617d9f1.pdf
    • https://static.usrfiles.com/ugd/cc14e4_910b4895db3640d49c711c8d3e5f5831.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c43ab42b40f4f7a892d247be19dfa8a.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/android_fragment_dependency.pdf
    • https://cdn.shopify.com/s/files/1/0430/4073/5381/files/bendix_ad9_air_dryer.pdf
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/extra_deep_pocket_cal_king_fitted_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c8e.bin
7a162ab91b37c586aad309884ffa7748d7b3e2c155c68ac838410a7d215e90d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8E 3628 bytes
font_01_sfnt_off0000696f.bin
8a274fa6f9f127e8a0595d92230072d5654a766da57ad6fccc6850b39c62e44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696F 5132 bytes
font_02_sfnt_off00007ad0.bin
a2bc2acee9e29539d020356affea68632847fe70d05444accd3a66df1c4982dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD0 10028 bytes

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