Malicious PDF — malware analysis report

Static analysis result for SHA-256 da50502f89fc6949…

MALICIOUS

PDF

40.8 KB Created: 2020-08-01 16:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a65ae6900d58d72b7869728a0890c57 SHA-1: d0403a792e7db6a486e24167438c01a64c6985ff SHA-256: da50502f89fc6949bbe6be56a8cb2a5e4fe6b7a2163e8027344ff3d3478393e8
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a high number of embedded links. One of these links, 'https://ttraff.ru/pify?keyword=ask+carolyn+arcamax', is identified as a malicious redirector. The presence of numerous links, including to Shopify domains, suggests a link farm or SEO manipulation tactic, potentially leading to further malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific 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.ru/pify?keyword=ask+carolyn+arcamax
    • http://files.dimensionsbydan.com/uploads/1/3/0/8/130813558/2914304.pdf
    • http://files.christophertstout.com/uploads/1/3/0/9/130969645/nolaromotim.pdf
    • http://files.usispo.org/uploads/1/3/1/6/131637135/towoxatijitefurikoz.pdf
    • http://files.plantsandfriendstogo.com/uploads/1/3/0/8/130814232/vevelugijag_rugab_pikesuvevubot.pdf
    • https://cdn.shopify.com/s/files/1/0440/9848/6424/files/fapuwotekena.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/minekasilepizebakonob.pdf
    • https://cdn.shopify.com/s/files/1/0428/6867/0620/files/73311163790.pdf
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/wusuwika.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/fulutorukoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/worogomanenetudexo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3694/1215/files/89253752372.pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/72984643530.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/1072210431.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/2175110401.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_off000061d4.bin
613b217c303af44b06be7504aa8d8169c1b747658b7fe3ad2b3343dc21c90a60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D4 5168 bytes
font_01_sfnt_off00007363.bin
e2a0ff81dc32a8788b7cef887b49e05b68090e3bc385b30c8f9ef23365240bf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7363 10388 bytes

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