PDF malware analysis — malicious · 3bf9ca8345dcaf62

MALICIOUS

PDF

44.4 KB Created: 2020-07-30 09:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b1374c483ed2a5034cc9e872f9e41bf3 SHA-1: f2f3bf2c3dc63261b19f0420b1334d5bd3a2d892 SHA-256: 3bf9ca8345dcaf625ba0e4664d0a0914b47b79ae5534479227c0c2c14e44903f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This indicates an attempt to redirect the user to a malicious site. Additionally, a PDF link farm heuristic suggests the document is designed to host numerous external links, further supporting the attack pattern of luring users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=oxford+bookworms+pdf+stage+4
- http://files.theologythatsings.com/uploads/1/3/0/8/130813025/2893436.pdf
- http://files.scautoservices.co.uk/uploads/1/3/2/8/132814465/cb05039d.pdf
- http://files.stevensonpto.com/uploads/1/3/1/6/131637553/sekeriguvovugi-bikawezive-baxuligenitux.pdf
- http://files.goodshepherdbeaverton.org/uploads/1/3/1/4/131406222/05ec9bbf7332a.pdf
- http://files.immaculate-concepts.com/uploads/1/3/2/6/132681891/16ea09.pdf
- https://cdn.shopify.com/s/files/1/0431/1708/4839/files/68851358777.pdf
- https://cdn.shopify.com/s/files/1/0432/3390/2760/files/nemudevefuzip.pdf
- https://cdn.shopify.com/s/files/1/0433/0569/7438/files/24735183819.pdf
- https://cdn.shopify.com/s/files/1/0428/7509/3159/files/5078921153.pdf
- https://cdn.shopify.com/s/files/1/0434/4584/6168/files/temegijivofiluzepanosepu.pdf
- https://cdn.shopify.com/s/files/1/0431/4395/4594/files/pisubewamufeputomotume.pdf
- https://cdn.shopify.com/s/files/1/0429/8421/0583/files/17909621290.pdf
- https://cdn.shopify.com/s/files/1/0438/8959/0427/files/solakaki.pdf
- https://cdn.shopify.com/s/files/1/0431/9277/8912/files/8906641431.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57189589950.pdf
- https://cdn.shopify.com/s/files/1/0437/9744/6816/files/mofera.pdf
- https://cdn.shopify.com/s/files/1/0433/1424/9886/files/49008146941.pdf
- https://cdn.shopify.com/s/files/1/0434/0826/1285/files/93216907499.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/1/0434/4584/6168/files/temegijiv

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006dd2.bin` `e81733c699cd65163976912db89a7404980044108ec42b9773d52a0e367a8968`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DD2	5440 bytes
`font_01_sfnt_off00008076.bin` `f497a6170104f55c096f59613a1a5e7f7a61575054a050826b6a7a5b05a564c6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8076	10524 bytes

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