Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f07f398f53691fd…

MALICIOUS

PDF

44.9 KB Created: 2020-08-23 04:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7cb40545186b6693108ba200e0cfe06 SHA-1: 3e378558e9b127bdb3e33c1fe275bd99803f4cbd SHA-256: 8f07f398f53691fd6abe5e52300e5b7434dc11fa41f64f46da573eb5c1a1efc2
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to host malicious content. One of these links, 'https://ttraff.cc/pify?keyword=circle+of+life+2019', is known to redirect to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=circle+of+life+2019
    • http://files.cochrantonfair.org/uploads/1/3/0/9/130969381/ee1908f16a32ca.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/8620779583.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/83753273106.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/31837480988.pdf
    • https://cdn.shopify.com/s/files/1/0460/1557/8279/files/wedding_invitation_wording_templates_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/20315533953.pdf
    • https://cdn.shopify.com/s/files/1/0432/1496/2848/files/85450981726.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/fuburisevepumukirefape.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/82422932649.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_off000067a2.bin
894bb059c21c71f2b4c671c6c3474910fa0f926c8717368d7b094a16846431a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A2 4596 bytes
font_01_sfnt_off00007745.bin
7169647dbad67ebed03cab373e7116904267eb30789f1b2518f78f9ef853f926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7745 9992 bytes
font_02_sfnt_off00009969.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9969 4324 bytes

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