Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c699ffaa09c9d0…

MALICIOUS

PDF

40.9 KB Created: 2020-07-29 14:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6c19465520bca23265b40befb4cfde SHA-1: 108960520ba3ad1c9b04a2c31c317af4ee048d87 SHA-256: a5c699ffaa09c9d03de0138d06a1464d9869bb53c483bbc2b942ee4e30c22d98
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.ru'. This suggests a phishing or malicious redirection attempt. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment of a malicious redirection attack pattern. No scripts were extracted, limiting the analysis to the PDF's link structure and heuristics.

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.ru/pify?keyword=factors+affecting+photosynthesis+pdf
    • http://files.afterloss.com/uploads/1/3/1/8/131856627/558178b451.pdf
    • http://files.rmlandscape2.com/uploads/1/3/0/9/130969075/zezivomixi.pdf
    • http://files.aprilfairbrother.com/uploads/1/3/1/4/131437889/6de74cdccab2ee.pdf
    • http://files.aprilfairbrother.com/uploads/1/3/1/4/131437889/6de74cdccab2ee.p
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/49659067174.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sividejujim.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/ranaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/guwotexanamegajujubip.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/dikonekasefebusoruk.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/80882474091.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/2920067482.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/guwubikotegasasuserik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/1047922199.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/39400212011.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0439/5817/3854/files/31054731012.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.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_off00006268.bin
8b84b78682c1548ca31a3b8d168ce117adf4b96637d50d2ae00158848f9f7afb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6268 5232 bytes
font_01_sfnt_off00007433.bin
db97d7cd1342ea1dbd1d35fd4397d1af44d79105cb3bf992210826c4d57827e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7433 10040 bytes

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