Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b88a74e937f4e8…

MALICIOUS

PDF

43.0 KB Created: 2020-08-26 13:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0e7713a90f999c55807249d32e6d12a SHA-1: d925a3f1c3574f1198852dd55101cadfafa8f588 SHA-256: 98b88a74e937f4e8cd8a6f969e1f54fede99d9e9485c819fd89b8efd43c286d8
158 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing indicates a link to known malicious infrastructure. The primary malicious URL is https://ttraff.cc/pify?keyword=self+editing+for+fiction+writers, which likely serves as a lure to a phishing or malware distribution site. The document also contains a large number of SEO-linked PDFs, suggesting a link farm or content stuffing tactic.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=self+editing+for+fiction+writers
    • http://fadafi.anatomy-demystified.com/uploads/1/3/1/4/131406436/114d2a86.pdf
    • http://xawof.shepherdscott.com/uploads/1/3/0/8/130813528/0ee4d62ffbd8.pdf
    • http://denizete.tide-lander.com/uploads/1/3/2/7/132712415/4988558a326e0.pdf
    • https://cdn.shopify.com/s/files/1/0431/3376/3746/files/28019485340.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/50547506888.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/kizuxiru.pdf
    • https://cdn.shopify.com/s/files/1/0439/1511/6696/files/50813160538.pdf
    • https://cdn.shopify.com/s/files/1/0462/7372/4576/files/84765283792.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5047/files/kraus_antenna_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8829/files/software_audacity_for_windows_7_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/64021408030.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/gemesivetufux.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/soxugepebanemuzowujowana.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_off00006a4a.bin
2e522d765869ac6d654a1568594572df118c0777efee9bbb86a981e2e5725c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4A 5176 bytes
font_01_sfnt_off00007c03.bin
69740e7cbb5e5957ab22b8b2a26256a5cc9d489c796161c0c84f00b2fc73a0a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C03 10364 bytes

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