Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d379b5c36d8b75b…

MALICIOUS

PDF

37.9 KB Created: 2020-08-20 06:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57bc54c46e1e429765c1ff2ac0a974f7 SHA-1: 681d7f0967b2f6574bbc34793ffc17f1f0e4f333 SHA-256: 8d379b5c36d8b75b6b3075783dfca94946fa00ce1acb74d4b651023101518339
120 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=boletin+informativo+ministerio+de+seguridad+buenos+aires'. It also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains text related to 'Boletin informativo ministerio de seguridad buenos aires', suggesting a lure to trick users into clicking the malicious link. The primary attack pattern involves social engineering to redirect users to potentially harmful content.

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.com/pify?keyword=boletin+informativo+ministerio+de+seguridad+buenos+aires
    • http://files.northbiomed.com/uploads/1/3/0/9/130969681/2459984.pdf
    • http://files.qldsighthoundassociation.com/uploads/1/3/1/8/131871745/38bbe2.pdf
    • http://koriwudi.abellcable.com/uploads/1/3/2/8/132815806/4180883.pdf
    • https://cdn.shopify.com/s/files/1/0433/7749/2118/files/emotional_regulation_worksheets_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/43302824561.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/algorithms_and_data_structures_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/10200132931.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/walewikufonufuguv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/calculus_and_its_applications_14th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8615/files/ziwikofuzagunuteruwil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7347/files/briket_arang.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_off000050be.bin
cdb02421afc418e396d053eb4672a41ff1127803275580c7704c001c6487e2fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50BE 5476 bytes
font_01_sfnt_off00006345.bin
6fa62d2463631d0bfcb615dcabb44ee2c1bd2362daea8eeb19dd3d26ad3c5310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6345 11524 bytes

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