Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90a081e5d2b2c21…

MALICIOUS

PDF

47.8 KB Created: 2020-08-19 23:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9dd50dc086dcd470de697b1bf7078ed SHA-1: 1baa7ba39bb8ff7479b491b72dcebe74c6796e0c SHA-256: e90a081e5d2b2c210e45113e5770cf25388f3b473965d9415e744142541b2601
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=fastest+fishing+guide+osrs', suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=fastest+fishing+guide+osrs
    • http://vigatid.misspankhurstslearningspace.com/uploads/1/3/2/6/132696434/5935369.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/77533102749.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/tesis_de_maestria_en_administracion_publica.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1715/files/que_es_el_marketing_relacional.pdf
    • https://cdn.shopify.com/s/files/1/0428/2528/5798/files/89228416530.pdf
    • https://cdn.shopify.com/s/files/1/0437/1379/0106/files/96099760808.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/murokujevovaxijelisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/xosirifibo.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_off00007e88.bin
e3101d01a61a671b7067f81dd9d069c30160b194bb99ab8f2b505f4d0654e151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E88 5092 bytes
font_01_sfnt_off00008fc5.bin
e149b9d8c5d78d4df501f909661ab1842c7d277ec9d7ae07dcc61361632a3d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC5 10352 bytes

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