PDF malware analysis — malicious · cd906ed850189ce7

MALICIOUS

PDF

56.6 KB Created: 2020-07-30 06:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 06dc6f6e137e98ba6bd808f5b4c05004 SHA-1: b25f433dd41186ee6e7ecd81fca5488863dbf9c0 SHA-256: cd906ed850189ce7553e311132df80443d780b36bac19415f3655d0d1a6bae0d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious due to a high number of embedded links, many of which lead to a redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not intended for human consumption but rather as a vehicle for the embedded links.

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.cc/wb?keyword=kinh%20l%E1%BA%A1y%20cha%201%20pdf
- http://files.metermixdispense.com/uploads/1/3/1/4/131438038/f8730f32cb63.pdf
- http://files.historicfoodways.org/uploads/1/3/2/7/132740584/2db35dc7c.pdf
- http://files.jeffcofiretraining.org/uploads/1/3/2/6/132681409/4110604.pdf
- https://cdn.shopify.com/s/files/1/0431/4651/0504/files/xogowekepakizaxolasonubed.pdf
- https://cdn.shopify.com/s/files/1/0431/7275/7668/files/vawupirerojepujivor.pdf
- https://cdn.shopify.com/s/files/1/0429/9161/6153/files/warinovuvugozirolis.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
- https://cdn.shopify.com/s/files/1/0428/9767/0303/files/nudotebojelolusuwazebaw.pdf
- https://cdn.shopify.com/s/files/1/0431/4506/8699/files/zivedasepimusapuje.pdf
- https://cdn.shopify.com/s/files/1/0431/8068/7524/files/wuvukulejoxarebopojuwi.pdf
- https://cdn.shopify.com/s/files/1/0437/6117/2631/files/jilelaropudu.pdf
- https://cdn.shopify.com/s/files/1/0431/1954/2434/files/42043117474.pdf
- https://cdn.shopify.com/s/files/1/0428/5346/6271/files/roniloropivome.pdf
- https://cdn.shopify.com/s/files/1/0436/2344/8736/files/besitezorak.pdf
- https://cdn.shopify.com/s/files/1/0431/7986/8324/files/mutidabiginizizote.pdf
- https://cdn.shopify.com/s/files/1/0432/5464/4894/files/dezadojize.pdf
- https://cdn.shopify.com/s/files/1/0429/4174/3263/files/fuvagaduwemazobi.pdf
- https://cdn.shopify.com/s/files/1/0433/6405/7238/files/vamotewopem.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_off0000915c.bin` `c0acd6654009c1343ee51718fe2aebe863a55d55a6c33841da6abfa14a7a6bf4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x915C	4796 bytes
`font_01_sfnt_off0000a106.bin` `4fc580e936ce63586829e532972f3df3551951397b1a8a0761dad59f949e1a5d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA106	23676 bytes

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