PDF malware analysis — malicious · 3e0a10dd7958e026

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 12:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b9d05d125fc6d0851dd33daea22818ce SHA-1: 934c64856e61e89e10904701a72f91b846f06e73 SHA-256: 3e0a10dd7958e026cc15dd63b013bd6faf928cfedfcd831832e4a2129fc2c75c

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the string 'Elementary algebra worksheets with answers' and the malicious URL, indicating a lure to disguise the malicious intent. No scripts were extracted from this sample.

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=elementary+algebra+worksheets+with+answers
- http://files.kurtisestes.com/uploads/1/3/0/7/130776561/3609238.pdf
- http://files.chna18.org/uploads/1/3/0/7/130775653/nilitujuje.pdf
- https://cdn.shopify.com/s/files/1/0438/6163/9318/files/dekanotonojo.pdf
- https://cdn.shopify.com/s/files/1/0432/2571/0750/files/82526960142.pdf
- https://cdn.shopify.com/s/files/1/0427/5542/4423/files/memorial_service_template_editable.pdf
- https://cdn.shopify.com/s/files/1/0429/4764/1511/files/36449286725.pdf
- https://cdn.shopify.com/s/files/1/0431/6109/2245/files/sebaxegitam.pdf
- https://cdn.shopify.com/s/files/1/0429/7703/4399/files/sexikibad.pdf
- https://cdn.shopify.com/s/files/1/0433/7077/4693/files/remudobuvag.pdf
- https://cdn.shopify.com/s/files/1/0428/5199/1719/files/42609262259.pdf
- https://cdn.shopify.com/s/files/1/0430/5462/9015/files/41774510720.pdf
- https://cdn.shopify.com/s/files/1/0428/7237/3411/files/46781235567.pdf
- https://cdn.shopify.com/s/files/1/0434/5259/6374/files/mibaf.pdf
- https://cdn.shopify.com/s/files/1/0430/7812/3674/files/61884695182.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
- https://cdn.shopify.com/s/files/1/0432/3305/0779/files/52983573214.pdf
- https://cdn.shopify.com/s/files/1/0430/3051/1779/files/76925795732.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00006b18.bin` `97e7c2822a808cc6a69dbc962a7a2ab6d3d350e0aebf723d2dfb8900f4d9d4e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B18	5452 bytes
`font_01_sfnt_off00007d93.bin` `6bd8c82f92e8238a5939e1f4579493bd1f822f094b946091454beaf7b5117a0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D93	9956 bytes

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