Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0d807c360c46d3…

MALICIOUS

PDF

46.8 KB Created: 2020-08-19 23:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07164be3f3f669d4d5b6e63b1cadad86 SHA-1: 98fe8bd9dba95a1c530742d9d1cd9ddf0e39a091 SHA-256: 9a0d807c360c46d354b85860342c2cd133840341c6876ecbee587d03b74881c5
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, contains the string 'Application form visa korea selatan' and the malicious URL, suggesting a phishing lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=application+form+visa+korea+selatan
    • http://files.staceymyshack.com/uploads/1/3/0/7/130775180/22db5758aa7a2c.pdf
    • https://cdn.shopify.com/s/files/1/0434/1779/6770/files/71898948886.pdf
    • https://cdn.shopify.com/s/files/1/0436/0188/7396/files/42571942976.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/l_argumentation_dans_la_communication.pdf
    • https://cdn.shopify.com/s/files/1/0431/2868/4701/files/59776223649.pdf
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/28593256341.pdf
    • https://cdn.shopify.com/s/files/1/0428/6503/3383/files/13711799212.pdf
    • https://cdn.shopify.com/s/files/1/0433/7831/1326/files/dollar_to_cents.pdf
    • https://cdn.shopify.com/s/files/1/0428/6929/3223/files/53386586383.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d09.bin
7c5c95dbb3a89e23d2c17298f44d22cadb32d25f0f97779fa1b410d7ad08a3de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D09 5276 bytes
font_01_sfnt_off00006ee6.bin
31b217215bdf2b4558e2b35392d1c454dd30e87a0569a3a756219cdedfeeb62b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 13240 bytes
font_02_sfnt_off000099b7.bin
ff88491e9b53368aa3a30e8dd34a5b3a2a650623abbadb69eae8d512e7150c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99B7 16084 bytes

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