PDF malware analysis — malicious · 232efb995e1d7d89

MALICIOUS

PDF

40.4 KB Created: 2020-08-28 07:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0b833a9af8419c46890d7817b0fb2955 SHA-1: f2cedd2e0890cefbb2e156645ac4d30958d6b64b SHA-256: 232efb995e1d7d8953bd6db1c605b58a5b2451f59bc0d920fed66e4d79920f5d

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'kawasaki repair manual free download'. This suggests a phishing or scam attempt, likely leading to further malicious content or malware download. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=kawasaki+repair+manual+free+download
- http://dujus.balannz.com/uploads/1/3/2/8/132814930/2f9e93925d0b5e.pdf
- http://files.waialuabulldogs.com/uploads/1/3/1/0/131070289/kukavumisununik.pdf
- https://cdn.shopify.com/s/files/1/0431/6420/5216/files/31906881314.pdf
- https://cdn.shopify.com/s/files/1/0428/4848/5535/files/american_pie_5_fzmovies._net.pdf
- https://cdn.shopify.com/s/files/1/0432/2433/4496/files/xapamon.pdf
- https://cdn.shopify.com/s/files/1/0434/1104/6561/files/getupunex.pdf
- https://cdn.shopify.com/s/files/1/0437/4996/5985/files/24070857845.pdf
- https://cdn.shopify.com/s/files/1/0440/6706/1910/files/page_fault_in_non_paged_area.pdf
- https://cdn.shopify.com/s/files/1/0433/3443/4969/files/retinoblastoma_2020.pdf
- https://cdn.shopify.com/s/files/1/0434/2602/1527/files/24875828397.pdf
- https://cdn.shopify.com/s/files/1/0439/9228/5342/files/58724071241.pdf
- https://cdn.shopify.com/s/files/1/0430/7759/9383/files/40105176806.pdf
- https://medlineplus.gov/kawasakidisease.html
- 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_off00006052.bin` `5345cb1b0baab9ae64bfed4d3f6039b6fd2fdcef6c5fce426257ac9eb2b6c053`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6052	5312 bytes
`font_01_sfnt_off0000725e.bin` `0ae7b694f30a800eee9c54f7c5b0ba1aa6761f856ec8b67a8837b5353b1bec44`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x725E	10108 bytes

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