Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe2a6365a1af11c…

MALICIOUS

PDF

38.7 KB Created: 2020-08-19 01:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05f718eebaf488fccdc942ac650a7b5e SHA-1: fff522a546c1c333ea18b47cf94cc66ef7ea72f2 SHA-256: dbe2a6365a1af11c5ab646a8535a1ccec2ae88ce0d5bc7eea05de722cd060458
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to "teacher calling card templates". The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further stages of the attack. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=teacher+calling+card+templates
    • http://ranutesiw.carpetcleaninghuntsville.com/uploads/1/3/1/4/131438641/5891879.pdf
    • http://mimamazo.fortunatierra.com/uploads/1/3/0/8/130874359/aa043d6bf9a95a5.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/88283285830.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/aadhar_card_form_new.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/32270852375.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0434/4404/3943/files/26688711011.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/87083300818.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/xewojoribu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/ribatuwaxuwap.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_off000059b6.bin
44a9020c29effc8deb99a6ac3467d86c15ab5638cea220a73ed73ebde2983f96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B6 5436 bytes
font_01_sfnt_off00006c00.bin
31524c965588394884441facf95c5e2cbb057730dc8dbd6b32aacedc9cdb2d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 10192 bytes

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