Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c7d3f8f5b479de…

MALICIOUS

PDF

47.4 KB Created: 2020-08-02 07:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b456db4f4bb5300b2610863e46ad706e SHA-1: a7c4848b3ad5eebb0d4c7b0f0b810f9a5ac1cc0c SHA-256: 27c7d3f8f5b479de8b21c90340a3b827bea8fc55caf7ec560611044600b7f041
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://ttraff.com/pify?keyword=smith+and+wesson+forum', is identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was largely unreadable, but the heuristics and URL analysis strongly indicate a malicious intent, likely related to driving traffic to malicious infrastructure.

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=smith+and+wesson+forum
    • http://files.lillianlanko.com/uploads/1/3/2/8/132815924/4936349.pdf
    • http://files.rmckendreeb.com/uploads/1/3/1/4/131453574/zupejarufo-fejezurukuvu-lofobadunafeba-morur.pdf
    • http://files.noc1.net/uploads/1/3/2/6/132681824/128de4ca8fd5.pdf
    • http://files.joanlinnehan.com/uploads/1/3/2/8/132816096/bozurijuwuda-tebupuj-lojenoxato-tupebenederi.pdf
    • http://files.gatheringspartyscapes.com/uploads/1/3/1/6/131636642/4f5d36309b85dd3.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/rinivega.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/66667553800.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/88139395641.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3880/files/3040307087.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/36229096089.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/sapat.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/39498643110.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bolosenisom.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/upsmi_tracking_number.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/dugusolisivuxekezewe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5672/5153/files/nusazipunorap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.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_off0000728f.bin
0a55d1d6d06db1243f4f80cfb5ab03fbdda9775f6ad450fceb385270b75efba3
pdf-font-stream PDF embedded font (sfnt) at offset 0x728F 5312 bytes
font_01_sfnt_off00008481.bin
eea6c8c7a00efe163b05b5186c26b055c155cc40f1edfab60270e97ce325e988
pdf-font-stream PDF embedded font (sfnt) at offset 0x8481 14212 bytes