Malicious PDF — malware analysis report

Static analysis result for SHA-256 62200f91bff319c4…

MALICIOUS

PDF

47.8 KB Created: 2020-09-17 16:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23c028bd7e427beb6cd6e0889dac4e1c SHA-1: d6ff681829c777d6bab69e91a9a95f3a7c11cd1a SHA-256: 62200f91bff319c4264efef5abbedcaeb9ffa8eb4e1f146243a941bcf24bf6c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to other PDF files hosted on external domains. One of the primary links directs to a known malicious redirector, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=diffusion+of+buddhism+in+asia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://284cd388-168f-4f35-a637-324bde4b19d2.filesusr.com/ugd/16879a_69092495c0474da4970cca9686f8f85f.pdf?index=true
    • https://fc08ed6a-ebbb-460f-ad32-221f4f1ca53f.filesusr.com/ugd/dba42a_3e4c82c4c361426db8b4f59ce7afe75b.pdf?index=true
    • https://945f18ee-55a7-4025-a587-edc9c984370e.filesusr.com/ugd/82e28d_b6d77c73457d441ea5ea54d7feb104cb.pdf?index=true
    • https://b5d16fe2-a9e6-4d1a-a936-bfee557f16e9.filesusr.com/ugd/7836c9_810e46e231f3426eaa935d7102581972.pdf?index=true
    • https://8b099a35-327e-45a8-a4b8-d03e53dc248d.filesusr.com/ugd/dec231_12c9013a47b8496f92c57483ed0a560b.pdf?index=true
    • https://6657cfda-73ea-4f25-ab7c-26bdea074d38.filesusr.com/ugd/9d7ad9_4c5cd61dbbcd41c6b69d00bd6f3c7c8b.pdf?index=true
    • https://ea11ad54-7b84-4292-852b-874b8f83162c.filesusr.com/ugd/bba345_206bd5e73c7d43349f5b82f6fd474271.pdf?index=true
    • https://7f24a824-54f9-4635-90ea-568a998204a1.filesusr.com/ugd/98e2de_47dfc87aaa8a474b8f4f8dd280d928f4.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/fofenufupanibebemutu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/university_of_south_carolina_map.pdf
    • https://bd4b223e-9b73-4b2b-ad10-1518a40a5555.filesusr.com/ugd/0adedf_d417e20e5e0f43caa7e50cb58cca0900.pdf?index=true
    • https://507787f1-fae7-4e73-8721-e720b7b61584.filesusr.com/ugd/132250_407cbc8c858d4c35acd0a672415c7827.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f21.bin
54b2264b75ac6514e1da2fee349217d380f48b52f1fc67d777da3bde1486db6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F21 5156 bytes
font_01_sfnt_off00009086.bin
f9fb47b52c789f826b682a2166d64f0fb1e18b271322010d006f555a54d8f20f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9086 10056 bytes

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