Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24e52bb4edfb5cc…

MALICIOUS

PDF

42.5 KB Created: 2020-08-08 07:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66bd3d52efde9665fcbdcd05d1b3a8ff SHA-1: fc7af89f9a63d0a52873e452eb49465ddf860fe2 SHA-256: e24e52bb4edfb5cce99651b60f2e254ae678ba98044dbc3ba41b537dc722aefa
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users searching for English learning materials. This URL redirects to a known malicious domain, suggesting the primary purpose is to lead users to malicious content.

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=kesulitan+belajar+bahasa+inggris+pdf
    • http://files.mmedugroup.org/uploads/1/3/1/4/131453252/491dd8fdbf4c13.pdf
    • http://files.christthehealer.org/uploads/1/3/1/3/131380558/6fc5d987.pdf
    • http://files.seah.space/uploads/1/3/1/0/131070313/jupelidatexeku.pdf
    • http://files.lauraswinkfineart.com/uploads/1/3/0/8/130813100/2bf149.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/botiredujopuvasuguruboja.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/mimorak.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/zurunorisajakejet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9861/files/92529091003.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lavatorumagenikezelun.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/20053264414.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/28938277212.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/excel_for_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/1351/2100/files/smoke_on_the_water_guitar_tabs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7075/files/guvibugagaxugemanevawalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/duzavuvupadowofewer.pdf
    • https://cdn.shopify.com/s/files/1/0431/2449/0397/files/barycentre_de_3_points.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_off0000678c.bin
468831bff34eb27236dd276c54b356e22578dc70b0419100c28e3bef5eb07645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678C 5488 bytes
font_01_sfnt_off00007a38.bin
587ece11bbb2c976b5dec38daf13dd9811012a2fb047fae279fcba709b4a711d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A38 10248 bytes

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