PDF malware analysis — malicious · 3845521cb6d1e9a0

MALICIOUS

PDF

84.0 KB Created: 2020-08-03 11:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9dc9895389d0fcbb65520b10997f7a98 SHA-1: 5e456f757d79ee4fb738cda63018ba087933c390 SHA-256: 3845521cb6d1e9a033df90905c89ebc40d47d9e4210eca7c168c9cb1b3216f44

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple heuristics indicating malicious redirection and a link farm. Specifically, it links to a known malicious redirector at 'https://ttraff.cc/pify?keyword=classification+of+chromatography+techniques+pdf'. The document body, though heavily obfuscated, contains references to the URL and appears to be a lure for users searching for chromatography techniques PDFs. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=classification+of+chromatography+techniques+pdf
- http://boxuziba.uhurugirlsacademy.org/uploads/1/3/0/7/130739625/dopinoxamamemel.pdf
- http://files.yourhousepimp.com/uploads/1/3/2/6/132695554/6522c037b.pdf
- http://files.reedertranslation.com/uploads/1/3/1/6/131637021/riwabaxenelekedudenu.pdf
- http://files.gassingamerica.com/uploads/1/3/1/4/131409693/8089457.pdf
- http://files.heartoftexasarmory.com/uploads/1/3/0/8/130874284/4195896.pdf
- https://cdn.shopify.com/s/files/1/0437/6703/8109/files/xupubavadimul.pdf
- https://cdn.shopify.com/s/files/1/0431/2950/3901/files/34788126945.pdf
- https://cdn.shopify.com/s/files/1/0430/2772/6489/files/65062895341.pdf
- https://cdn.shopify.com/s/files/1/0432/8413/6086/files/23419171127.pdf
- https://cdn.shopify.com/s/files/1/0428/7060/3932/files/longest_anime_name.pdf
- https://cdn.shopify.com/s/files/1/0428/1604/5222/files/xomegaxafedag.pdf
- https://cdn.shopify.com/s/files/1/0430/3526/3138/files/favubidabiruj.pdf
- https://cdn.shopify.com/s/files/1/0432/7673/0533/files/83065962297.pdf
- https://cdn.shopify.com/s/files/1/0433/0084/7781/files/xixetefevajekowuseke.pdf
- https://cdn.shopify.com/s/files/1/0433/7467/4083/files/wirokokanomude.pdf
- https://cdn.shopify.com/s/files/1/0435/4772/1882/files/letoviwabijagok.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef08.bin` `b7570145f397ed68bf64015932477bebaaf0fa78f8025e9fb087af5fe65b91ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF08	5704 bytes
`font_01_sfnt_off0001023b.bin` `cd24a5b8a5f4b797def5b4902225fac90963963a84870081f0b9f5ca68654c14`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1023B	12692 bytes
`font_02_sfnt_off00012cbc.bin` `9e4265a29980eb0856412f08a1531ef9bc31f7270d08920f81547b60c48c08f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CBC	16184 bytes

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