PDF malware analysis — malicious · debbd258df5fa01d

MALICIOUS

PDF

37.7 KB Created: 2020-08-15 23:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 20d1aede2d0b9b3995e1ccb26bae7ecf SHA-1: fbf877779b0b65a8d476564bc1ea9f7df7cf0847 SHA-256: debbd258df5fa01d95ba4d94d2099c18ae57b5d367a646a240645294780aea53

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links, identified as a PDF link farm. One of the primary links directs to a known malicious redirector, ttraff.ru, which is likely used to distribute further malicious content or phishing pages. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests an attempt to manipulate search engine results or host malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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/wb?keyword=sony%20mex-n4100bt%20car%20stereo%20with%20bluetooth%20manual
- http://files.carouselmusictheater.org/uploads/1/3/2/6/132695832/3168216.pdf
- http://vusaj.stmwvenue.co.uk/uploads/1/3/1/0/131070767/e72bcf069f4.pdf
- http://gusol.bethefkingman.com/uploads/1/3/1/6/131637254/40a588b1.pdf
- http://nipolas.thinkfutureworkforce.com/uploads/1/3/0/7/130775507/vuwem.pdf
- https://cdn.shopify.com/s/files/1/0432/5857/7056/files/fujobopazone.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rafudegilezenetizaxesuvos.pdf
- https://cdn.shopify.com/s/files/1/0429/9735/0554/files/77277604220.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedapefe.pdf
- https://cdn.shopify.com/s/files/1/0435/6577/7059/files/jazz_ukulele_tabs.pdf
- https://cdn.shopify.com/s/files/1/0429/8991/2218/files/osu_skins_2018.pdf
- https://cdn.shopify.com/s/files/1/0440/3537/5254/files/prostate_biopsy_procedure.pdf
- https://cdn.shopify.com/s/files/1/0432/1535/6067/files/18594800531.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_off00005337.bin` `031b872febc1e252f687d55a7d5e570995a1e8a86f9391d3b49bde8d8afd4c12`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5337	5856 bytes
`font_01_sfnt_off00006719.bin` `4655a3e17ff65e49c5185b9eca1359a1423b50bc37651e0fcc2df89c16a55004`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6719	10268 bytes

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