Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a29fce14dd9957…

MALICIOUS

PDF

39.1 KB Created: 2020-08-29 13:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0313b98122d364c1596ab928a872b23c SHA-1: e6380bdeb1b411c1ce23902a6fc293ef955fd349 SHA-256: 40a29fce14dd9957f4be6cdafbbfb3b7446fb70bdb73b28ed7592d0a5ddc8758
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one to 'ttraff.com', are likely part of a phishing or malware distribution scheme. The document body contains garbled text but also includes the suspicious URL, reinforcing the malicious intent.

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/wix?keyword=alpha+golf+driver
    • https://static.usrfiles.com/ugd/b8c837_15e9eb2a86294556bd47030af114e33a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c92483f654da4abebf15557d295bfa6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_58ab13cd913f46148ffee3d58e94a141.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8de1a510741490685f51a983956bd75.pdf
    • https://cdn.shopify.com/s/files/1/0434/4971/2807/files/47817608427.pdf
    • https://cdn.shopify.com/s/files/1/0433/0464/8859/files/75006297120.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/81677143499.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1989/files/foponiwokewigaxuropiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/4482/1409/files/list_of_english_words.pdf
    • https://cdn.shopify.com/s/files/1/0434/1373/3533/files/kefuponazofafasu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/bescherelle_allemand_grammaire.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/58940299263.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_off00005cb1.bin
ab4e557f0b86ff39b81558656ca0286009cd0b3f4b974e653e5c9d071ed8f73e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB1 5172 bytes
font_01_sfnt_off00006e4a.bin
1b63527f89aa22149fc1856cc354f33cf89523241fd21cc23a7faacdf76eea3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4A 9988 bytes

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