PDF malware analysis — malicious · f8ce668d90d51aa2

MALICIOUS

PDF

78.5 KB Created: 2020-09-15 19:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1fafa57bb51ee3245ce895be9452beac SHA-1: 7eb5432144b3a02e289fbe8ee2547650caa23ffa SHA-256: f8ce668d90d51aa28ee06b6d2c7a093a471a9e3f1a1ffa809afcc3ae6aa42ce7

168 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to '2020 federal income tax brackets' and the malicious URL itself. The SE_ADVANCE_FEE_SCAM_LURE heuristic further indicates this is likely an advance-fee scam. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger infrastructure for distributing malicious content.

Heuristics 5

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.
Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE

Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
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/wb?keyword=2020%20federal%20income%20tax%20brackets
- https://static.usrfiles.com/ugd/5bb01c_4e907596163c44e18429ad61acb866fc.pdf
- https://static.usrfiles.com/ugd/33ab24_b4c61513ba0b491cad98236ac24a196d.pdf
- https://static.usrfiles.com/ugd/b8c837_16a197206b3d42e798e881b61fe74dd9.pdf
- https://cdn.shopify.com/s/files/1/0427/9074/8316/files/2702713163.pdf
- https://static.usrfiles.com/ugd/2c76f4_1404264b1e4d4539ad60ccbf2704bc53.pdf
- https://static.usrfiles.com/ugd/ab059d_7ac4b9e7b74a47ebb91bc324fe7c3174.pdf
- https://static.usrfiles.com/ugd/97368a_d526a3f736e74c96ae9919b82ea096ec.pdf
- https://static.usrfiles.com/ugd/cf5aa9_669ce245490d400c9470a56db43c62fa.pdf
- https://static.usrfiles.com/ugd/cb5dea_8ab9b25328b149768eb6f337d9c9e226.pdf
- https://cdn.shopify.com/s/files/1/0431/1636/3927/files/83020595189.pdf
- https://cdn.shopify.com/s/files/1/0431/9579/3557/files/64318004130.pdf
- https://cdn.shopify.com/s/files/1/0435/7236/3432/files/92504520749.pdf
- https://cdn.shopify.com/s/files/1/0433/8502/8758/files/wematuru.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_off0000f47e.bin` `1e3b16481619ab91d12bc34ceacfce8deb4dd174b2ad0ef8c1923ba900048daa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF47E	5620 bytes
`font_01_sfnt_off00010782.bin` `2c7856ca97fdeed8dedfecbd7062cc32cc9a275869b90a3ca1b3825ec92c1f10`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10782	11064 bytes

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