Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c772897018439f7…

MALICIOUS

PDF

39.1 KB Created: 2020-08-08 18:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06f7e5d3fe08e20128426ecff9f7e3cc SHA-1: b2ff2017c9771e86a8c94eed67dc1db992491ff4 SHA-256: 3c772897018439f70110ff69b922990fce77f7adf4c6649c3ac44bdc46a99577
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This indicates the primary function is to redirect the user to a malicious site, likely for further exploitation or phishing. The presence of a link farm further supports the malicious intent.

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/pify?keyword=aplasia+medular+en+el+embarazo+pdf
    • http://kigofese.rdaxpress.com/uploads/1/3/0/8/130874330/e610ff42.pdf
    • http://files.hugheslandscaping.com/uploads/1/3/0/8/130813612/seketelab_xumanagas_gakazotija_zoziz.pdf
    • http://files.juliagay.com/uploads/1/3/1/4/131409305/2757760.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/how_to_upload_photos_to_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/employee_notice_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/nevebeximexozene.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/swords_and_sandals_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/32798666132.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/18113025230.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/negafuxiporasalija.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/upsc_cse_maths_optional_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3463/9522/files/xabijenuremurur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/xofikodumuzunamiwoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/automobile_engineering_textbook_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/gumoworufupasezadav.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_off00005a69.bin
8a4df3862382a1e056fc2e43bc6850788193c89dd18cb346973e39137887d2e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A69 5368 bytes
font_01_sfnt_off00006c92.bin
f82adb8ae8d8170a2adcd61e44a981a686fc44205123a0db311123a5561aadc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C92 10704 bytes

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