Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3bfc643a66f238…

MALICIOUS

PDF

43.6 KB Created: 2020-08-01 06:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5b2fefffff60ff846d7ff59172565a9 SHA-1: 9785a6fbeb76e80e886b4d91b25c2951c6eec3c7 SHA-256: 3d3bfc643a66f2382f8a9c867a3fc010cbe8cb212d098f4032f3e7b47d0eab63
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to 'export gif in photoshop'. The presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites. The ML classifier strongly supports the malicious verdict.

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=how+to+export+gif+in+photoshop
    • http://files.citygroves.com/uploads/1/3/0/7/130739978/9560233.pdf
    • http://files.plympton-wyomingfair.com/uploads/1/3/0/7/130739061/5a5a2.pdf
    • http://files.grovecanada.org/uploads/1/3/0/9/130969659/47def0a30c.pdf
    • http://files.nourishinginsights.com/uploads/1/3/2/6/132695392/nipigepevipakopad.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0434/6439/2866/files/pusewizubutekipumuno.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/59832365066.pdf
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/sadisumajebinokipezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/darumutobovile.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/10819640220.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/77878240266.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1957/files/35062484936.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5626/files/71376781530.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/ga_market_bulletin.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/kezusavijizaliw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/niwoniruwodufofitetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/sagoketezelosajis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.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_off00006d88.bin
a3441ec86be4807a6c9350abc6ca1307d1b70c84c8557995fccd2981c91fa025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D88 5044 bytes
font_01_sfnt_off00007ecd.bin
d63f285c40dc233e8634416ed84d8104e6859b2353c66686c7ed596508fb71b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECD 10028 bytes

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