Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c9a1deccce8434…

MALICIOUS

PDF

46.4 KB Created: 2020-08-03 05:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a66575077c57f3d05d01b58f4668c0ea SHA-1: 18b70139023b188182e99cba058f2ef5a3d45a35 SHA-256: f6c9a1deccce84349a3c7c2570c7d300121468d8e7e83fd54ca91221982c3dd6
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=crystal+reed+age'. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or heavily encoded, but the presence of the malicious redirector URL and the link farm strongly suggest a phishing or malware distribution attempt.

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=crystal+reed+age
    • http://files.theordernj.com/uploads/1/3/0/7/130739405/libudutolut.pdf
    • http://files.amgilmorefineart.com/uploads/1/3/1/4/131483214/d2dfb20a4d2d86.pdf
    • http://files.sarfa.org/uploads/1/3/1/0/131071082/4035939.pdf
    • http://files.lovethelordfirstministries.com/uploads/1/3/1/6/131606128/c86f4a7.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/7785881812.pdf
    • https://cdn.shopify.com/s/files/1/0437/7572/1633/files/41163433301.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/96935217022.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4005/files/xexope.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/rujudewovug.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/16529797215.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/smiley_face_copy_and_paste.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/xafuxitivunu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/zudojodusikapiwakejujiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/68308569354.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/rupefip.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_off0000797d.bin
6d573d0e38826bf83fa75569d8e95f8777a159beb08eed951c23122cbb6f2218		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797D 5000 bytes
font_01_sfnt_off00008a91.bin
017783c1ea278b4f48b9683825e200746b007d6c8d110f2d37cd784f60b81bc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A91 10192 bytes

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