Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d3ac90c5ebfbb8…

MALICIOUS

PDF

44.2 KB Created: 2020-07-30 02:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 777d95868bb60ee76d96d2a253f1556b SHA-1: 37bf739a36e09b9e0a438cdb38f4b322db57366a SHA-256: 93d3ac90c5ebfbb861cdc662fe1824a18ce406d4909eea8acc8d87236f3fb18c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve search engine rankings for malicious content. One of the primary links directs to a known malicious redirector, 'ttraff.ru', with a keyword suggesting a lure for a specific PDF. The document body, though heavily obfuscated, contains text related to 'Bailey and love 27th edition pdf' and wkhtmltopdf, reinforcing the lure. No scripts were extracted, and the maliciousness appears to stem solely from the redirection infrastructure.

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=bailey+and+love+27th+edition+pdf
    • http://files.psuactsci.com/uploads/1/3/1/4/131453302/kagotusap.pdf
    • http://files.carriedolan.com/uploads/1/3/0/7/130776864/9017134.pdf
    • http://files.diamondlightworld.net/uploads/1/3/1/0/131070611/rijawosipobuv-luxolapajosa-dezovir-jorisufuk.pdf
    • http://files.policeaward.com/uploads/1/3/1/8/131856398/jazazole-wezofobifewe-pusonifol-wotiworutilo.pdf
    • http://files.carriedolan.com/upload
    • https://cdn.shopify.com/s/files/1/0428/5110/6972/files/leruvasewanajumuwefokal.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/92101523443.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0434/2526/7877/files/divinixazonaziwagidovoto.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/zinexelunagexuzen.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/81420917260.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/90929202432.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/vijiletug.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/larilu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/27004753389.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.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_off00007145.bin
d0c595b7b65ae86bd387f78c4fd9af8c4f761388fe50870df5a7b125a6e9fee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7145 5068 bytes
font_01_sfnt_off0000828f.bin
cd3bab4408cd5732c1aa3147a6f5f6fd0daff5b0a3d7362104c24def217da493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828F 9660 bytes

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