PDF malware analysis — malicious · 4c65a8e094d61f81

MALICIOUS

PDF

43.8 KB Created: 2020-08-18 17:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 812c7b555c0a7aa87c04b976ebe7115a SHA-1: a3a6f6f9c01ab2b5b123867f0a39453511457be6 SHA-256: 4c65a8e094d61f8107bdf4079a39dcba663f7b2f25818fa433fe4903fad5432b

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to 'improper integrals worksheet with solutions' and a URL that matches the malicious redirector. This suggests the document is designed to exploit SEO link farming techniques to distribute malicious content, likely leading to a phishing or malware download site.

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=improper+integrals+worksheet+with+solutions
- http://files.saintwindowcleaningcornwall.co.uk/uploads/1/3/0/8/130874063/1691413.pdf
- https://cdn.shopify.com/s/files/1/0432/3429/5966/files/namixajujiwekaw.pdf
- https://cdn.shopify.com/s/files/1/0434/2684/0738/files/naruto_shippuden_episode_279_english_dubbed.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
- https://cdn.shopify.com/s/files/1/0432/4756/7003/files/managerial_accounting_tools_for_business_decision_making.pdf
- https://cdn.shopify.com/s/files/1/0440/7810/4728/files/zokav.pdf
- https://cdn.shopify.com/s/files/1/0430/7661/6341/files/assistant_manager_interview_questions_and_answers.pdf
- https://cdn.shopify.com/s/files/1/0430/9496/6436/files/siguvifudow.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kekiwimuzavenomudajelibo.pdf
- https://cdn.shopify.com/s/files/1/0434/6245/9544/files/58359932028.pdf
- https://cdn.shopify.com/s/files/1/0440/0090/3318/files/30319588553.pdf
- https://cdn.shopify.com/s/files/1/0432/1961/5901/files/makinet.pdf
- https://cdn.shopify.com/s/files/1/0438/1576/4128/files/zalorop.pdf
- https://cdn.shopify.com/s/files/1/0430/8933/0325/files/13822504896.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_off00005224.bin` `68fa761df335049513f09b4f13df4153110527e2171480102aa40d2364eb1d16`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5224	5328 bytes
`font_01_sfnt_off00006423.bin` `d2c5bac6b5f56fc222201eefa2d169d832efeecf9a69b566ef3a16f7d09232f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6423	12604 bytes
`font_02_sfnt_off00008c8d.bin` `d05f37f1530d5f93420ec1d1fef03be40ff404ab4da44f5daae16fd0829d120f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C8D	16168 bytes

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