Malicious PDF — malware analysis report

Static analysis result for SHA-256 27899ef1dd12bf00…

MALICIOUS

PDF

48.7 KB Created: 2020-07-28 04:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9774ec13eba73775c70a53353385c82d SHA-1: b0f83673c0c7a17f608041580a7264d57056145d SHA-256: 27899ef1dd12bf0025e68f76377a9546e6fb9eca87e30cbfb9394fb0e5f4421a
150 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one identified as a malicious redirector. The heuristic firings indicate a PDF link farm, suggesting the document's primary purpose is to direct users to potentially harmful websites. No scripts were extracted, limiting the analysis of direct payload execution.

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=exalting+guide+flight+rising
    • http://files.pascaline-preorder.com/uploads/1/3/1/3/131383959/geril.pdf
    • http://files.butterupbreadshop.com/uploads/1/3/1/0/131069886/744198.pdf
    • http://files.brandiecormier.com/uploads/1/3/1/3/131379296/842de64f8.pdf
    • http://files.thelawyernextdoor.com/uploads/1/3/2/6/132695472/sujiditosemanezonake.pdf
    • http://files.iahaschools.com/uploads/1/3/1/4/131407088/1777b4b3e08eaf5.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/muzobegadifu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/sarajove.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/kedovazipeteviw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/nifaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/4963/2412/files/gisixisojokufubov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/40665374058.pdf
    • https://cdn.shopify.com/s/files/1/0436/1709/1744/files/96359625757.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/47458980104.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/dojupixafo.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_off0000819a.bin
c60e8a837190dbad8107767fe73eee2fa08f6e7357cfad5ab035511516817953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819A 4964 bytes
font_01_sfnt_off0000926e.bin
5315cc75d746cf6281a87bbb70ca1f6ee722b6efd17a0b82abe4e70db903a095		 pdf-font-stream PDF embedded font (sfnt) at offset 0x926E 10268 bytes

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