Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71264b79ce8e33d…

MALICIOUS

PDF

49.7 KB Created: 2020-08-19 07:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bfe34a1330bd12c7bc3b7dd52991f80 SHA-1: 5ce31fd30c4bfa4be7b7072df5247953376e02af SHA-256: c71264b79ce8e33dac2b70d9b0f4de10a173c5ec23fd147eed000bcf700e4627
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious link, 'https://ttraff.ru/pify?keyword=casio+hr-+100tm+user+guide', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious sites, likely for further exploitation or phishing.

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=casio+hr-+100tm+user+guide
    • http://votepu.erinridgeaalhoa.com/uploads/1/3/0/7/130775971/6953890.pdf
    • http://files.pennybrumbaugh.info/uploads/1/3/0/8/130874489/aca00a2.pdf
    • http://nogax.murraydopking.com/uploads/1/3/0/8/130814328/weseriwipunesevo.pdf
    • http://wuxiparo.hiphopprinciples.com/uploads/1/3/1/3/131381518/9772647.pdf
    • http://fejujivek.brandtmarineinc.com/uploads/1/3/0/7/130739615/4248737.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/98882460839.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8901/files/zeparorogirazosikoxilu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7441/0909/files/post_office_building_plan_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/vebezivolewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/jusimumeboranepinikativo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5706/1788/files/befabikonififimor.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/buxejado.pdf
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/tewazo.pdf
    • https://cdn.shopify.com/s/files/1/0447/4558/8887/files/27820653546.pdf
    • https://cdn.shopify.com/s/files/1/0429/1294/0188/files/82266389217.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_off000084ba.bin
885e40d96111d854985e40851bd8c395c63f7bd67dd4647b6aaea5cc996c2db1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84BA 5336 bytes
font_01_sfnt_off000096bf.bin
193204c4527bc9401587e2638aed75bfc531ff05672fe80b437713afc1fac5bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96BF 10428 bytes

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