PDF malware analysis — malicious · 9f358e4c49a36544

MALICIOUS

PDF

44.8 KB Created: 2020-07-21 09:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a355423c5adbc10478384576877e5bec SHA-1: fcf31f2c6a19da4f761e93e1f755c57001517ab2 SHA-256: 9f358e4c49a365440b0b4f9816e9ba6305e75922a63201fe8e2acd210c2f3af8

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Half life problems worksheet answers'. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a harmful site, likely for credential harvesting or malware delivery.

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=half%20life%20problems%20worksheet%20answers
- http://files.latisserande.com/uploads/1/3/2/6/132681337/cc2f70dc8d.pdf
- http://files.fiercefirepro.com/uploads/1/3/1/6/131636845/vixexexivijekileku.pdf
- http://files.sebianhealingcenter.com/uploads/1/3/0/8/130814674/8293381.pdf
- https://cdn.shopify.c
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
- https://cdn.shopify.com/s/files/1/0432/5359/6322/files/5745181307.pdf
- https://cdn.shopify.com/s/files/1/0429/5704/5913/files/82998661304.pdf
- https://cdn.shopify.com/s/files/1/0431/4421/6727/files/71629199162.pdf
- https://jobupatifela.files.wordpress.com/2020/07/80354316756.pdf
- https://womonuxad.files.wordpress.com/2020/06/91594917923.pdf
- https://vivikevom.files.wordpress.com/2020/07/15233379272.pdf
- https://zexixomiwos.files.wordpress.com/2020/06/93511000154.pdf
- https://cdn.shopify.com/s/files/1/0435/2393/2311/files/9948998231.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
- https://cdn.shopify.com/s/files/1/0434/8418/4728/files/betenatadep.pdf
- https://cdn.shopify.com/s/files/1/0432/6018/2692/files/xanowuregurinene.pdf
- https://cdn.shopify.com/s/files/1/0430/4214/4407/files/jineworuvi.pdf
- https://cdn.shopify.com/s/files/1/0429/5163/9196/files/puzomojunagiw.pdf
- https://cdn.shopify.com/s/files/1/0431/4100/5480/files/46999028568.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_off000071a0.bin` `5fd540464ef54cd669fbb49743ce1952c5230488d0e2f85558017c5c08d0188b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71A0	5184 bytes
`font_01_sfnt_off0000831b.bin` `e538a479ff56a1862050d69a29e2b04e796dfd2c017fe3e81b020b012b225921`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x831B	10172 bytes

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