Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1e0a8ad08ac9b6…

MALICIOUS

PDF

38.1 KB Created: 2020-09-17 18:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a3d9954f5bd40752dfb33ae8325f926 SHA-1: 50d17f8cc950c7e08f6148bbf4939fe9367b7906 SHA-256: cc1e0a8ad08ac9b6e0a8326186bc96a8a1305a0e8b236ec23e4e1e443dbc8f5a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One of the extracted URLs, https://ttraff.club/wix?keyword=cafe+beignet+gulf+shores, is identified as a known malicious redirector. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the primary malicious activity appears to be the link farm.

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.club/wix?keyword=cafe+beignet+gulf+shores
    • https://4013eede-9d32-4eae-9cc0-8f3a09a01cc3.filesusr.com/ugd/03ae60_7e795da5e73a432596f463233478fbd6.pdf?index=true
    • https://46e406f9-1088-46e7-b817-403ac0dfa200.filesusr.com/ugd/a421e3_ba10d720bf7343ceaaa334f962f9fb11.pdf?index=true
    • https://dcf20d3a-b698-4e31-839d-fb428777e5e3.filesusr.com/ugd/d61b30_e96a31ee95dd4df09190e7cd9ca99a11.pdf?index=true
    • https://4b60c4e1-b73c-49fc-a14b-1b84abf94fc7.filesusr.com/ugd/8a5fcf_a326f8a419ef4be08811af92ae71b728.pdf?index=true
    • https://e082c9d5-f9c2-4eda-ae71-0ca6203de260.filesusr.com/ugd/7f614e_6af2ce09bac846aaae7729dd077cb038.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/59088893316.pdf
    • https://cdn.shopify.com/s/files/1/0481/4353/2185/files/why_are_babies_like_hinges_math_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/28117295978.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/moroji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5136/0164/files/36424910563.pdf
    • https://2832d55e-8682-443e-a788-9f7183a941af.filesusr.com/ugd/dcc11b_70f2553d3e19477993748c6ac85046f0.pdf?index=true
    • https://f4d96377-c0a5-4c84-8c9f-3c5ee51498ec.filesusr.com/ugd/9b33c5_9699dffb89ef45a0baaadf9813df563d.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049be.bin
3c9934207522f59c48b435d019654004a6dcad1d12d37f7ed0ac475092bebafc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49BE 5072 bytes
font_01_sfnt_off00005b01.bin
909d5b8018ccf082bc8f0b783d55c60271eea21e2714b4ebf793e004dfbc4e30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B01 10104 bytes
font_02_sfnt_off00007db1.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB1 4324 bytes

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