Malicious PDF — malware analysis report

Static analysis result for SHA-256 21da2d818cdbb389…

MALICIOUS

PDF

41.5 KB Created: 2020-08-16 23:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 975d39813e82df88dcd2328d82983fae SHA-1: c484a5f102bc56a315f61d0c7ab0096425e567bc SHA-256: 21da2d818cdbb38971a8176cd366e22caa4e7ea8f93a9f92d489b14499f281d2
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=asme+y14.+5m-+1994+pdf'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure malicious destinations. The document body itself contains the target URL, reinforcing the lure.

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.cc/pify?keyword=asme+y14.+5m-+1994+pdf
    • http://files.dimante.co.uk/uploads/1/3/0/8/130873894/4631926.pdf
    • http://files.jda-tele.com/uploads/1/3/0/7/130738719/lujemoxuze.pdf
    • http://files.gargiulocaterers.com/uploads/1/3/1/4/131483154/5864398.pdf
    • http://files.covid-19-avoid-queues-crowds-bookeo-demos.com/uploads/1/3/2/7/132741081/5876857.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1024/files/4396234707.pdf
    • https://cdn.shopify.com/s/files/1/0440/7066/6392/files/pathfinder_beginner_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/turepasekel.pdf
    • https://cdn.shopify.com/s/files/1/0429/5999/5033/files/ambiente_laboral_saludable.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugomedimugatusigoxafif.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/nudemunelojok.pdf
    • https://cdn.shopify.com/s/files/1/0434/0557/4309/files/89632765538.pdf
    • https://cdn.shopify.com/s/files/1/0435/6374/5441/files/business_management_a_value_chain_approach_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8726/files/jezetabupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/gewuki.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_off0000595e.bin
708f818fc9e8c741e8cf331960d7909b260e336c7510431c2400c657ee68088a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595E 5424 bytes
font_01_sfnt_off00006bea.bin
2379e38a74b4c59ed1d5f40f8e13aae89af563d0fcc8c498b0f67b2a584c830b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEA 14560 bytes

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