PDF malware analysis — malicious · b51c8c8c82cef972

MALICIOUS

PDF

51.7 KB Created: 2020-09-18 00:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 027265e44fc9607d022b99841011afe8 SHA-1: 8295e8ac8b9586a53cdb74dd0acd8ce91e4c39fb SHA-256: b51c8c8c82cef97281f74d219427eb89afaefeef1220615b3135144decbdb6f6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and contains a link farm of 13 PDF files hosted on Shopify. One of the embedded links directs to a known malicious redirector at 'https://ttraff.ru/wix?keyword=spandam+voice+actor'. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf.

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/wix?keyword=spandam+voice+actor
- https://cdn.shopify.com/s/files/1/0439/5152/1947/files/punuze.pdf
- https://cdn.shopify.com/s/files/1/0439/0794/0520/files/bufakuxavurabo.pdf
- https://cdn.shopify.com/s/files/1/0434/7330/5762/files/rudumudamumiwamesimiret.pdf
- https://cdn.shopify.com/s/files/1/0463/5597/2258/files/webasto_air_top_2000_st_user_manual.pdf
- https://cdn.shopify.com/s/files/1/0429/3813/8783/files/devexpress_web_report_demo.pdf
- https://cdn.shopify.com/s/files/1/0434/9604/6752/files/31345159252.pdf
- https://cdn.shopify.com/s/files/1/0433/9515/4069/files/dikox.pdf
- https://cdn.shopify.com/s/files/1/0462/3902/3253/files/dalufofolodefepusipi.pdf
- https://cdn.shopify.com/s/files/1/0440/8908/2006/files/wolf_m_series_double_oven_manual.pdf
- https://6a20b193-d6e3-482b-ab11-76d89bd9da07.filesusr.com/ugd/4cf28d_28f7f4ad1cab452bac6539b0b985b7f3.pdf?index=true
- https://9cdc2fc4-dc09-4dc5-b206-f8008b9ff43a.filesusr.com/ugd/d31907_284ddc58423843379844314c642acc34.pdf?index=true
- https://cdn.shopify.com/s/files/1/0433/5442/3464/files/15508457085.pdf
- https://cdn.shopify.com/s/files/1/0428/6034/7551/files/88883038123.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006592.bin` `d6354d7c62fcf511d528cdf3a5c2628e9164c35a342b161ad40c5f1a6d0fb363`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6592	3620 bytes
`font_01_sfnt_off00007286.bin` `ebce67cfd18ab524e99c4975547b8bbe0029812785e91becf808edcad7404e9f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7286	4960 bytes
`font_02_sfnt_off00008344.bin` `0a0a13a275315fc70ad0e38e0abe1c89d598233b269b48cddbb430b0de8f82ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8344	15860 bytes
`font_03_sfnt_off0000b400.bin` `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB400	4324 bytes

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