Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9c9dcce1c3be3d…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 09:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcb805ead75381bf3da23e0fdb682460 SHA-1: 6d07a4f81a4af52cfbf5c97194d5ef3aff012ee4 SHA-256: 7c9c9dcce1c3be3ddd6aa1231364a55e461ce6a0850118ab2f8620d9f03aa2ee
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, characteristic of a link farm. One of these links, 'https://ttraff.com/pify?keyword=cheryl+blossom+comics+pdf', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a malicious redirector suggests an attempt to lure users to malicious content.

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.com/pify?keyword=cheryl+blossom+comics+pdf
    • http://files.planning4yourfuture.com/uploads/1/3/0/7/130739674/mosezimagugipiwaba.pdf
    • http://segav.luisarciniega.org/uploads/1/3/0/7/130775379/5988389.pdf
    • http://files.hilesassociates.com/uploads/1/3/0/7/130738722/keletupukeripu.pdf
    • http://files.zilpavandergragt-artstudio.com/uploads/1/3/1/4/131438443/bowalifavo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/86394105132.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/suxukereki.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/economist_may_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/9620/1629/files/mexabevelizufetedosili.pdf
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/bigazizepa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5422/7871/files/nokovexazokijipuporaviru.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/besafusomitodavupu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/423234735.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/13512478496.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/38510241962.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_off00006ab7.bin
bab88f654222bd1bda4e7362594c22e11d8aaf34e753cd5fdf9c7507c430ab47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB7 5332 bytes
font_01_sfnt_off00007cb0.bin
3f8bb661a1027a50a2a3b49859b4ce30f0420b3eb7a4aa86e3ed3bed1fc0e922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB0 10092 bytes

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