Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8db8a3f5ce53e8d…

MALICIOUS

PDF

48.5 KB Created: 2020-08-19 01:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5437e7334bcc3cf34d43cdf51f137c08 SHA-1: 80ff18ca9751c2a967cdc77c29a205cbe6384685 SHA-256: d8db8a3f5ce53e8d507877656c18bbe323399af22ffdbca199496ba407b9c289
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. This suggests the document is designed to lure users to malicious websites. The PDF structure and the presence of numerous links are indicative of a link farm or phishing attempt. No scripts were extracted, limiting the analysis of direct payload execution.

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=ark+metal+tree+platform+extinction
    • http://files.neurosurgerytraining.org/uploads/1/3/2/6/132682851/da334c5d.pdf
    • http://files.waynesburgcentralbands.org/uploads/1/3/1/4/131453284/f8f3b75b9.pdf
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/nutamutedawowimusiwudufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/check_your_english_vocabulary_for_banking_and_finance.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/acrobat_reader_and_editor.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/welonuramideg.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8807/files/10907993653.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/upkar_ntse_book_class_10_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/33769540422.pdf
    • https://cdn.shopify.com/s/files/1/0439/0155/0760/files/58055171630.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/497687380.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3899/files/sabawube.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/61469535483.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/68967450334.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_off0000800e.bin
e9565c2a7fbd1b4c523d03da7d6f150bca1ed8db76159191fa5a198482ed5898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800E 5104 bytes
font_01_sfnt_off00009154.bin
76b9fcacd28e312823ee9deff703577584eb34fede4061df574faf1eb28624e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9154 10592 bytes

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