PDF malware analysis — malicious · 4637e370b599e18c

MALICIOUS

PDF

45.6 KB Created: 2020-07-31 05:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a87cd731676c5ae1dc415a5399791d34 SHA-1: 5d9651446f5c78ab201af622f8f653b1dfa4a71c SHA-256: 4637e370b599e18cc62702f3df8dae81aa84969f7247af78594d49bee084d6ef

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Tamil to English dictionary pdf free download'. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious activity. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=tamil+to+english+dictionary+pdf+free+download
- http://files.keishamorris.com/uploads/1/3/1/6/131636833/c0058d61a67249.pdf
- http://files.corkholistichealingdirectory.com/uploads/1/3/0/9/130969809/89c5a4b.pdf
- http://files.andbreathefilm.com/uploads/1/3/1/4/131483097/rawujujafazup.pdf
- https://cdn.shopify.com/s/files/1/0438/2598/7741/files/zabepivexamuvepan.pdf
- https://cdn.shopify.com/s/files/1/0433/6697/3589/files/42820712379.pdf
- https://cdn.shopify.com/s/files/1/0437/8283/2280/files/lufaj.pdf
- https://cdn.shopify.com/s/files/1/0427/9740/0223/files/39793383442.pdf
- https://cdn.shopify.com/s/files/1/0437/7539/3944/files/41452723148.pdf
- https://cdn.shopify.com/s/files/1/0432/8911/6840/files/61617464387.pdf
- https://cdn.shopify.com/s/files/1/0429/6625/3724/files/29061359668.pdf
- https://cdn.shopify.com/s/files/1/0432/3626/2050/files/sabegugopezogata.pdf
- https://cdn.shopify.com/s/files/1/0435/6833/2959/files/84259613144.pdf
- https://cdn.shopify.com/s/files/1/0433/4374/1083/files/16609909352.pdf
- https://cdn.shopify.com/s/files/1/0435/9228/6363/files/2705448111.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.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/1/04

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006392.bin` `46bbead73024812679cff0ed444f941439257084c2beb33711dc7af032c85d88`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6392	5500 bytes
`font_01_sfnt_off0000762b.bin` `1fc4b0db848e79bc0400bbdda1f81c942970fcaaa8b410b7e6469294e333e7eb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x762B	4328 bytes
`font_02_sfnt_off000085c7.bin` `62f8d14a430c8d6f4e515c302fbfcd5fee3e2a010b7b2c8e929d336a497bdca9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85C7	10232 bytes

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