PDF malware analysis — malicious · 2afe50757a6310ad

MALICIOUS

PDF

47.8 KB Created: 2020-08-19 03:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0381f5fdf1497f476a2416fd2ab78cdf SHA-1: 3949e1671d52fd0fca0f77343ca053d2e2a78940 SHA-256: 2afe50757a6310ad988bf8ca93937f54418bf09a732131072aa2fab93a43dd5b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, with a critical heuristic identifying a malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'English grammar worksheets free pdf' and the malicious URL, suggesting a lure. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting the user to a malicious site via the embedded link.

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=english+grammar+worksheets+free+pdf
- http://files.mjdsteel.com/uploads/1/3/1/4/131438567/3c02d9b8c9.pdf
- http://files.inthetote.com/uploads/1/3/1/3/131398424/9898084.pdf
- https://cdn.shopify.com/s/files/1/0433/8299/7148/files/defensa_personal_israeli_krav_maga.pdf
- https://cdn.shopify.com/s/files/1/0433/0763/0747/files/international_financial_management_6th_edition.pdf
- https://cdn.shopify.com/s/files/1/0431/3071/6322/files/gomobekuri.pdf
- https://cdn.shopify.com/s/files/1/0433/5032/7454/files/vigagimefusulokosodala.pdf
- https://cdn.shopify.com/s/files/1/0429/2119/7724/files/lima_barreto_cemitrio_dos_vivos.pdf
- https://cdn.shopify.com/s/files/1/0434/0439/4646/files/freelance_marketing_contract_template.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdf
- https://cdn.shopify.com/s/files/1/0440/1309/3029/files/19291321116.pdf
- https://cdn.shopify.com/s/files/1/0428/5795/5487/files/18457522354.pdf
- https://cdn.shopify.com/s/files/1/0431/9812/0096/files/7616637419.pdf
- https://cdn.shopify.com/s/files/1/0437/2103/1832/files/pdf_editor_portable.pdf
- https://cdn.shopify.com/s/files/1/0433/1801/8216/files/10806048916.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/
- https://cdn.shopify.com/s/files

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006ec7.bin` `202b1646542a8280e4756fd5293d35e12f0f50bb5cd6825b46f3e4ddbceefd0e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EC7	5356 bytes
`font_01_sfnt_off000080dc.bin` `7d6b8dcf0a7538c263b2001cb495424c6aa66c7a026a68c64226e62cf949c259`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80DC	10200 bytes
`font_02_sfnt_off0000a397.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA397	4324 bytes

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