Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7dce377a426f32…

MALICIOUS

PDF

44.3 KB Created: 2020-08-08 14:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab7cc9ee947a5504b218ae837fc96274 SHA-1: 76de1b30843712f20c77ac8d7b9e88f8807184c2 SHA-256: ca7dce377a426f32f13301757f193ec8b4e98531be5465e22a778372399073a3
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 indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'applied mathematics syllabus pdf' and the malicious URL. The primary intent appears to be directing users to a malicious site via a deceptive link, masquerading as an academic resource.

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.ru/pify?keyword=applied+mathematics+syllabus+pdf
    • http://files.mdesignslincoln.com/uploads/1/3/0/7/130740213/mominekejapunuvevu.pdf
    • http://files.carolynforest.com/uploads/1/3/1/4/131454051/wabaxebafu-ferejewivivepim.pdf
    • http://files.gaythessaloniki.com/uploads/1/3/1/4/131453206/zoronofami-letonikenajuv.pdf
    • http://files.bonvivantgourmets.com/uploads/1/3/1/4/131452935/8320689.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/jowuzulizorerogege.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/76008179161.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/nibofopowoxafa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5180/0981/files/fewojekiboxakadepabibedez.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/52760090904.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/53091912883.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/42550179028.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8450/files/23252995609.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_off000062c4.bin
9fa063a262181b50213a268048f0d7d942418d518b2250e8d95218c1d9dc5bc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 5196 bytes
font_01_sfnt_off00007479.bin
0ca9eb6b7f93951edf132109c51b7d34819c7da160cd2cc8ec8cba06060c43de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7479 9896 bytes
font_02_sfnt_off00009641.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9641 4324 bytes

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