Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0e1ff6a8f1591f…

MALICIOUS

PDF

55.6 KB Created: 2020-08-18 20:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7bbb827d2b71139b51d6000a92e65d6 SHA-1: ed7faff90f0b421e9fa5277c1cb6bf63b9fa13fe SHA-256: 4e0e1ff6a8f1591fb5001c828b432d20c9ebecfa9b7eebced81b16ba2963bb8f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to PDFs hosted on cdn.shopify.com and other domains. The document body contains the target URL and a list of other PDF URLs, suggesting an attempt to manipulate search engine results or redirect users to malicious content. No scripts were extracted, but the presence of the malicious redirector and link farm strongly indicates a phishing or SEO poisoning attack.

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.com/pify?keyword=brooklyn+nine+nine++all+seasons
    • http://files.creativityandperformance.com/uploads/1/3/0/7/130776594/jopake.pdf
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/65162976443.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/wenovoresurotumasuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/77402426215.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/abc_tracing_paper.pdf
    • https://cdn.shopify.com/s/files/1/0439/1131/5611/files/2533798892.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/poxeru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/the_secret_to_attracting_money_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/78245707184.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/83443622409.pdf
    • https://cdn.shopify.com/s/files/1/0435/8026/0511/files/96328817680.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/38087643213.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
stream_005_off00009ece.bin
55009357dc2f3ae07e241579a552e5cac099f7750c82ebd0bd3cd17320efe735
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9ECE 28412 bytes
font_00_sfnt_off00006a9f.bin
5bb523568dcc75908d61ff780f3eb1d181dd958fcf6802b9c09c242666e0dcfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9F 4896 bytes
font_01_sfnt_off00007b58.bin
8841215aadd8e10a6cf01349dd757aa279ecce2f3b192220a7ade6417cf42428
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B58 10268 bytes