Malicious PDF — malware analysis report

Static analysis result for SHA-256 442ce2ec5178a321…

MALICIOUS

PDF

57.8 KB Created: 2020-08-09 14:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c85bcb1a200cdf47b97bbada4b189e2 SHA-1: 4b81e51986f69fcac05f731c3b4e00e92035fb37 SHA-256: 442ce2ec5178a3213de939cac35146c353f180c34026ff311b70f84a9af8f487
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the link https://ttraff.cc/pify?keyword=integrated+resistors+and+capacitors+in+vlsi+design+pdf leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm designed to attract traffic. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking Shopify URLs.

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=integrated+resistors+and+capacitors+in+vlsi+design+pdf
    • http://rugulixa.nationsmidwifery.com/uploads/1/3/1/4/131407227/juxewat.pdf
    • http://files.ttgymnastics.com/uploads/1/3/2/7/132741334/3867813.pdf
    • http://files.onewireless.co.za/uploads/1/3/1/1/131163737/ec951ac8d54d.pdf
    • http://files.araigneearcaneservices.org/uploads/1/3/1/1/131164479/guxon.pdf
    • http://xubes.stlwineguy.com/uploads/1/3/1/4/131437792/xojufipebiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/sebaxusapas.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/tajonilaboxufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/41101337748.pdf
    • https://cdn.shopify.com/s/files/1/0434/3899/7669/files/54222235266.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/visedufita.pdf
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/46807797210.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/vovelaxedenamivejekirazif.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/basidiomycota_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/nunopirewibofudep.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/nuwebubifepi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/zozaxatokatuxukexu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/kazuo_inamori_libros.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/28198358580.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_off00008def.bin
65e4ee343e60e75e677306a9ec97339d9078ee5382c4529978aa0bc8550f5df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEF 1788 bytes
font_01_sfnt_off00009677.bin
e88d14c4cb7242f6258d0c9aa267821942517c40fd5f846e2355488aee72a531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9677 5108 bytes
font_02_sfnt_off0000a7e2.bin
80d160a9172cedd823d6313db304add9abd5bdd136290b70f90d2a940f51cdf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E2 10240 bytes
font_03_sfnt_off0000cade.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCADE 4324 bytes

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