PDF malware analysis — malicious · a5020c56181c32ae

MALICIOUS

PDF

44.8 KB Created: 2020-08-19 20:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 73a24f324421482a585798c4758e538e SHA-1: 466e4e50737acb2c56064a6b2f9df0a6ec1d7913 SHA-256: a5020c56181c32ae1b9dc206e2f30497e1d939b5cbcbef194cc150115d326e64

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=commercial+invoice+template+excel+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains language suggesting an invoice lure, supported by the 'SE_INVOICE_LURE' heuristic. The presence of a link farm heuristic indicates an attempt to manipulate search engine results or distribute content widely. The file is generated by wkhtmltopdf, suggesting it might be a dynamically created document.

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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=commercial+invoice+template+excel+free
- http://files.rosenmedic.com/uploads/1/3/0/7/130775712/c6568b.pdf
- https://cdn.shopify.com/s/files/1/0434/6108/3301/files/solopujuxabezak.pdf
- https://cdn.shopify.com/s/files/1/0444/2229/9815/files/6th_grade_math_olympiad_problems.pdf
- https://cdn.shopify.com/s/files/1/0441/4029/8392/files/dangsmith_funny_test_answers.pdf
- https://cdn.shopify.com/s/files/1/0427/5362/2182/files/anatomical_terms_for_body_parts.pdf
- https://cdn.shopify.com/s/files/1/0432/6519/6197/files/64848907747.pdf
- https://cdn.shopify.com/s/files/1/0439/7583/5806/files/98086509836.pdf
- https://cdn.shopify.com/s/files/1/0432/0342/8510/files/xopebobufi.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
- https://cdn.shopify.com/s/files/1/0432/8436/5476/files/xetuwesitato.pdf
- https://cdn.shopify.com/s/files/1/0436/3547/4590/files/40869855609.pdf
- https://cdn.shopify.com/s/files/1/0429/5743/9129/files/nuance_power_review.pdf
- https://cdn.shopify.com/s/files/1/0434/7111/0310/files/congenital_heart_disease_textbook.pdf
- https://cdn.shopify.com/s/files/1/0432/4841/8973/files/62116250259.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_off000071ce.bin` `b1d3485c86b92e3151683fc453ef73d1df446fc2470b84418bd9758e02f5c998`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71CE	5016 bytes
`font_01_sfnt_off000082c9.bin` `c624de2a579fe8e590edced61ea819b3f32179e23c7f9449415ca2c31aad46aa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82C9	10260 bytes

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