Malicious PDF — malware analysis report

Static analysis result for SHA-256 394eed54b621196d…

MALICIOUS

PDF

43.1 KB Created: 2020-07-30 09:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 017ea78366080006c4ee93a1c7ea70af SHA-1: 3eaadd49663fbb766b686a7369c7e2c0adb7f484 SHA-256: 394eed54b621196de27d884127e5d768bac6d68d3d3fb6f574c7fe4ff84cdd61
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an orthopedic clinical examination document. The link points to 'ttraff.ru', which is known for malicious redirection. Additionally, the PDF includes a large number of external links, many hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The ML classifier also strongly indicated 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.ru/pify?keyword=orthopedic+clinical+examination+pdf
    • http://files.mychangingthenarrative.com/uploads/1/3/1/4/131437736/264d566d1c42.pdf
    • http://files.rachelliesphotography.com/uploads/1/3/0/7/130776277/814de915.pdf
    • http://files.dianashepherd.co.uk/uploads/1/3/0/7/130739144/nafav.pdf
    • http://files.bestyoulife.com/uploads/1/3/1/0/131069869/4484314.pdf
    • http://files.dublinbirding.com/uploads/1/3/1/0/131071252/e506117db8.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/81545262520.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/vuretijuponogasona.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/ladolewisevut.pdf
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/furunex.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/wabuxotidilisugipuxowid.pdf
    • https://cdn.shopify.com/s/files/1/0435/2566/9028/files/56966525878.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31903895201.pdf
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/62527106721.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/tusunuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibamiwa.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_off00006ba8.bin
9c249158f67ff8fe329080c68a1afe2e58b1656c7b92d5940bce3aed322be2e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA8 5100 bytes
font_01_sfnt_off00007cd5.bin
76852d18f4a43bc5dfb4882a362b9c179fe526eb9dabaaba401e7c16bec65265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD5 10000 bytes

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