Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d78a84a2ce7945…

MALICIOUS

PDF

41.3 KB Created: 2020-08-27 13:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43fe35c07f9d6165deb61bd3e7a6b2a8 SHA-1: 50c72f4db21178f99d6776bb75a5c11285392272 SHA-256: f1d78a84a2ce7945997293ea36d5768059bc4413091c4b47924cf0a821190ec4
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Secret love korean drama' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for 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.me/pify?keyword=secret+love+korean+drama
    • http://files.carolconnor.net/uploads/1/3/0/7/130776262/a6e8cc42c595b8e.pdf
    • http://files.norrissugarworks.com/uploads/1/3/1/4/131455722/lawejozegod-kufidovetaliri.pdf
    • http://doworo.fhsproductions.com/uploads/1/3/1/6/131637881/rirata.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/saran.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30547733638.pdf
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/autocad_2016_text_box.pdf
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/gaali_chirugaali_dj_naa_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0050/files/54379183740.pdf
    • https://cdn.shopify.com/s/files/1/0428/5726/7359/files/fupumusavupebinumix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7751/6955/files/2177697842.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.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_off0000636b.bin
6b00dae8eb29ab8f48007bf8474ba5d9d70e18ddf7f240c0d6de5715aad0517b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636B 5136 bytes
font_01_sfnt_off000074cb.bin
5efc7405078111feee242324bb9fb8c8919dfdf4addaa2c645e98e1e8ac338aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 10592 bytes

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