Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0ed22aaa7c15e6…

MALICIOUS

PDF

35.8 KB Created: 2020-08-24 20:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a62efc8eb55d9239fabe9b5d1ed6e839 SHA-1: d8cd655bfa5a83c374e7bbc6f6f71e5e486a80e8 SHA-256: fa0ed22aaa7c15e6ab402cc8c90df849b880aa88575b2c95a94ce284c14b63ca
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.com/pify?keyword=all+animals+pictures', is identified as a known malicious redirector. Another embedded URL, 'http://files.seekanddestroy.info/uploads/1/3/1/3/131380728/a77eca52.pdf', is also suspicious. The document body contains garbled text but includes the suspicious URL.

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=all+animals+pictures
    • http://files.seekanddestroy.info/uploads/1/3/1/3/131380728/a77eca52.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/54549682610.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/38320459487.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/66329735250.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/biblia_rv_1960.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2313/files/84928022728.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5877/files/51959998665.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9735/files/21958649468.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/borderlands_2_steam_achievements_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/acrobat_reader_7._0_full_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/46819120005.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/xaburevotoka.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/english_dictionary.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_off00004f79.bin
2a0d540be8eb8c433791c8c6ee66ae35806e78bfef2915b8fd3cf6cdb861f3aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F79 5068 bytes
font_01_sfnt_off00006094.bin
7b806f3f7947ed45f186efdb47bf44860e5a742e950a4bc2fa726f2c1f930d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6094 10184 bytes

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