Malicious PDF — malware analysis report

Static analysis result for SHA-256 587d37fd99ddc7a2…

MALICIOUS

PDF

42.1 KB Created: 2020-08-05 16:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cb94570ed26bf407c447bc249921bb0 SHA-1: f76c9ad3147c3aa86d380464265c5650845114e1 SHA-256: 587d37fd99ddc7a2a26a4904003de633ecb9e8cc63bbe9a1c518e7e69ec03303
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content, but ultimately redirects to a malicious URL. The primary malicious URL is ttraff.com, which is identified as a redirector. The document body, though heavily obfuscated, contains references to administrative manager duties and responsibilities, likely as a lure. No scripts were extracted from this sample.

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.com/pify?keyword=administrative+manager+duties+and+responsibilities+pdf
    • http://files.literacyforbigkids.com/uploads/1/3/0/7/130775529/garelipegad.pdf
    • http://files.m2reporter.com/uploads/1/3/0/7/130776164/jibiwenaxamavi.pdf
    • http://burob.balochitvonline.com/uploads/1/3/1/3/131398591/latalibiterikit.pdf
    • http://files.5wishesgeelong.com/uploads/1/3/1/4/131438195/gesexa.pdf
    • http://files.crystalmarull.com/uploads/1/3/0/9/130969897/webexuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumatuzonew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/phantasy_star_nova.pdf
    • https://cdn.shopify.com/s/files/1/0437/2925/6613/files/70824756474.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1227/files/toketoterixikuwozogexi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4756/8039/files/mudomiloj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/93020203817.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.pdf
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/lomejarem.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/46999028568.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/40396465090.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_off00006492.bin
3ae79196a5608e4e4e8f6df0eedfcb73b788cd9cb8d7dc9c54a7cfbb7311cf16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6492 5548 bytes
font_01_sfnt_off0000775b.bin
b28cf08fede54dc0e4eab46b8052cc4b1277ce010143b4d8a90378ff06d9411b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775B 10464 bytes

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