Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38a4d04b81daa1f…

MALICIOUS

PDF

40.7 KB Created: 2020-08-14 20:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fccfc4afabbdcb0ae5099ef5caea7b7 SHA-1: c949e1d85d9eab1add2ef7599ac1561599cbc58c SHA-256: f38a4d04b81daa1fef8685f47fff60821e8358847476279e9378986340ad8716
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body text and embedded URLs suggest a lure to download a PDF, which then redirects to malicious infrastructure. No scripts were extracted, limiting the analysis of further stages.

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.com/pify?keyword=arguably+by+christopher+hitchens+pdf
    • http://files.westlakespeechdebate.com/uploads/1/3/1/4/131454024/bugegafijuwipepipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9327/0429/files/82275156549.pdf
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/52902094501.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/animals_drawing_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/nefokexutidokexosizobof.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/83189461577.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/15962452205.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/47691347999.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_off000060b7.bin
924f9c572b41d216f7e84a4306a359760cffc4d31a766010dba9988dfd425df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 5648 bytes
font_01_sfnt_off000073e1.bin
e62ddd2720d618e307671e1f6e5393e4918877e580ee379450d963d1ee86f79b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E1 10120 bytes

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