Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bda2df92bb6a12a…

MALICIOUS

PDF

55.9 KB Created: 2020-08-25 06:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3490e0d096f003c6bf4246476e3ceda SHA-1: 95022a97712e9870a3757e791b874c35d3ceeaae SHA-256: 1bda2df92bb6a12ab2359a2251561c0e48e4a247bedcde5f920483ffaba09b74
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm designed to direct users to potentially harmful content. The ML classifier strongly supports the malicious nature of this document.

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=magalong+mamasapano+report
    • http://files.fredkaplanbiographer.com/uploads/1/3/1/4/131437225/6242197.pdf
    • http://files.alissahartenbaum.com/uploads/1/3/2/6/132683259/6213518.pdf
    • https://cdn.shopify.com/s/files/1/0434/8710/1094/files/fuwoked.pdf
    • https://cdn.shopify.com/s/files/1/0440/6712/7446/files/67464632537.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8904/files/fuxinulakuwuxixopedavu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8557/6857/files/kitumofo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3364/7525/files/multivariate_data_analysis_7th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/xosomojunetinexetom.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/bwwm_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/2574/3523/files/aseptic_processing_operation_contamination_control.pdf
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/bahubali_songs_malayalam_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/82924044580.pdf
    • https://cdn.shopify.com/s/files/1/0429/0061/9423/files/revisoxonizilu.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_off00009240.bin
6be6e161fb9966184e602a7fce8bc4c22da55af39ad4bbe52870f7f8705782b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9240 4884 bytes
font_01_sfnt_off0000a2c4.bin
f59f2c8b97ce17407b0d147f93b3a45f5fd2ed4fde1e94f2f383dd65573c105a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C4 9964 bytes
font_02_sfnt_off0000c4d6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D6 4324 bytes

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