PDF malware analysis — malicious · 8d96ea2f57d6d95e

MALICIOUS

PDF

41.6 KB Created: 2020-08-31 07:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1cb9a9875c6024d499e1ac04369cee68 SHA-1: b7e2e0b300ccd66c8b12ebe007afea7ba77655e2 SHA-256: 8d96ea2f57d6d95e8768edfc9f460e9154c6d2e7990d0b7b65246c0f56a2298b

152 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text "Ccna switching and routing pdf" and the malicious URL, suggesting a lure to download potentially harmful content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification.

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.cc/wix?keyword=ccna+switching+and+routing+pdf
- https://cdn.shopify.com/s/files/1/0429/5763/5743/files/39321739855.pdf
- https://cdn.shopify.com/s/files/1/0437/1985/2200/files/59809068524.pdf
- https://cdn.shopify.com/s/files/1/0450/3198/1220/files/48502845769.pdf
- https://cdn.shopify.com/s/files/1/0428/0070/9791/files/37040117292.pdf
- https://cdn.shopify.com/s/files/1/0433/4462/5822/files/26588263977.pdf
- https://static.usrfiles.com/ugd/b88e3d_2c3314fc48ea413aadb0759aaf02cc6c.pdf
- https://static.usrfiles.com/ugd/5899d5_6869bbf77c18472aa1a5f37478118d09.pdf
- https://cdn.shopify.com/s/files/1/0432/5359/6324/files/farenanebo.pdf
- https://cdn.shopify.com/s/files/1/0449/8610/6014/files/23287004549.pdf
- https://static.usrfiles.com/ugd/be19e1_0686293e2ec94ddeb7faaff06793e74d.pdf
- https://static.usrfiles.com/ugd/e4ff69_ad3f5e0dea7a44a9ab1544711c6b6505.pdf
- https://static.usrfiles.com/ugd/2f07a1_55f12faec0a840c9a179c1b3f302517b.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_off00006512.bin` `fefbf40ac92b65c91a58752480b41a0a3a1e3996a9887853ddd38a1ae327d77d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6512	5380 bytes
`font_01_sfnt_off00007763.bin` `b3cc1861192ec0d7438e88d41f13ef3f73478bea379f8275d1607596439bb477`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7763	10060 bytes

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