Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc4b0bd942028cb…

MALICIOUS

PDF

42.4 KB Created: 2020-08-18 15:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2347701c9acb55a08c5de5c96aad1ab SHA-1: 23fe96cf308a382f2c7726556b62f9ed2537451a SHA-256: 9bc4b0bd942028cb6ea3b62a7c18d9d5861d655a0fa2ab4f58ff34f83d6ad9db
150 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, embedding numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic, suggesting a lure to download further content. The ML classifier strongly indicates maliciousness.

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=gap+analysis+word+document+template
    • http://files.thefaithlife.org/uploads/1/3/0/7/130740524/d3c96d2c.pdf
    • http://files.dreamteamtraversecity.com/uploads/1/3/1/6/131636843/7121578.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8872/files/mildot_master.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/jafewemojuvenavevutisaru.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1985/files/32835876771.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4600/files/fajefikiniwosul.pdf
    • https://cdn.shopify.com/s/files/1/0447/5315/8298/files/sebebapilarizuvusunigimi.pdf
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/65162976443.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65496272691.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/jifogukopiwexomipojajobo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/herbalism_leveling_guide_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8720/files/22883760494.pdf
    • https://cdn.shopify.com/s/files/1/0440/7744/9366/files/55310883320.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_off00006872.bin
33b351d5c51aa3ea59efe397f6dcdcf5a77eaebc5f66053a759824b4b36ceec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6872 5444 bytes
font_01_sfnt_off00007afa.bin
2052029ffb5c9341b57fbfcaeb36762c7f8acd209e053030e41804ba6b45739c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFA 9964 bytes

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