Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bac88bd50ffe501…

MALICIOUS

PDF

54.1 KB Created: 2020-08-30 06:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d8eb448df9c79b218e96b7ee4f3d814 SHA-1: 0dd8bdd6a72d58093f80ebceb8e2ff7d85b145c1 SHA-256: 4bac88bd50ffe5013da85154c926fd70c9920d8a0c30bd5e58d5a7eb8fe61cad
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on Shopify. One of these links, however, directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking PDF links, suggesting a lure to disguise the malicious intent. The primary goal appears to be redirecting users to malicious content via the ttraff.cc domain.

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=ivan+turgenev+first+love+pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/carlos_marighella_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/sownik_polsko_angielski_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/examen_schema_et_appareillage_electrique.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/31627625492.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdf
    • https://cdn.shopify.com/s/files/1/0438/7448/4379/files/translate_blogger_templates.pdf
    • https://static.usrfiles.com/ugd/cb4a18_03c356e1aed744c1832c604418404b5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_aca4c2f294084a67a36027cb9138f938.pdf
    • https://static.usrfiles.com/ugd/fe83c3_ebe3b11fa9214114984d42722541a636.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/vozozifowemeluxipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/upsc_books_in_english_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/rupiwodamejovakulapog.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_off00006d54.bin
39e636e0e475de2b88d235ade7a632d849793d604e741dc0f8753f4ab102b729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D54 4860 bytes
font_01_sfnt_off00007e63.bin
96a5f0c57a476a3b1c72dcc2c3e7e40bc6f8ab5a291d8805a1433618b989b347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E63 5204 bytes
font_02_sfnt_off00009030.bin
644e379c3ba361dadd8cafced387b2443655dea676507ad5b669148efcc8d1da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9030 10436 bytes
font_03_sfnt_off0000b40f.bin
1f2fedb7aa08054ce8c5c783e5aca670001f1fce6378220498ea388636d4c027		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB40F 16600 bytes

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