PDF malware analysis — malicious · dbd1603f79292607

MALICIOUS

PDF

38.6 KB Created: 2020-08-29 14:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3f3f025c901e7c5cac61c52243377ee2 SHA-1: 3cd25e543200e0c8a8ebbb58d01a8791f6ef549b SHA-256: dbd1603f792926077f479ec88ab96e17ab8fa1f9220a180722a7a5a6a4f52c97

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 pointing to static.usrfiles.com, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics and IOCs. This suggests the PDF is designed to trick users into visiting a malicious site under the guise of educational content.

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=6+traits+of+a+market+economy+icivics+answer+key
- https://static.usrfiles.com/ugd/b8c837_f5e07f0d016147b8b28ddc512b72ef60.pdf
- https://static.usrfiles.com/ugd/4d6844_eb9e4d87485346ba901c1bd76dd7092d.pdf
- https://static.usrfiles.com/ugd/b8c837_05ac857d6e664b3b910f3edfe205fdd3.pdf
- https://static.usrfiles.com/ugd/b8c837_ea18c6f43d984f198b1cf0c001dc39e2.pdf
- https://static.usrfiles.com/ugd/33c377_f2874d5bea9b4d5f95f0242428668c04.pdf
- https://static.usrfiles.com/ugd/b8c837_408e0eff55044fd68ccb7aff459136fc.pdf
- https://static.usrfiles.com/ugd/b8c837_b56ac838de1e45c4aa4b3ce74cbf2cae.pdf
- https://static.usrfiles.com/ugd/b42fd6_ce9ca236e2c2420fa55f68107bbb13a0.pdf
- https://static.usrfiles.com/ugd/b8c837_6573bfaeffc24253bee62bc962877ac2.pdf
- https://cdn.shopify.com/s/files/1/0438/4532/0861/files/lozemazowukapupuvopoj.pdf
- https://cdn.shopify.com/s/files/1/0433/0763/0747/files/liverpool_vs_ac_milan_legends_team_sheet.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
- https://cdn.shopify.com/s/files/1/0431/9641/6157/files/kadavixelogedi.pdf
- https://cdn.shopify.com/s/files/1/0454/2595/0876/files/34345023854.pdf
- https://cdn.shopify.com/s/files/1/0434/0688/5027/files/gisuxa.pdf
- https://cdn.shopify.com/s/files/1/0431/6912/0413/files/bokexixagor.pdf
- https://cdn.shopify.com/s/files/1/0434/0737/6546/files/35103492084.pdf
- https://cdn.shopify.com/s/files/1/0437/9164/6880/files/adc_rune_pages_season_6.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/
- https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005a24.bin` `3bb366ff334374f08181e7b377e9a7c8748e392af76a2236352b1cc850a7d1a7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A24	5372 bytes
`font_01_sfnt_off00006c69.bin` `44f381c42a91ddbb190585ccdff214eb98ccc4c078de9afa3de4fa7c0c713876`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C69	9380 bytes

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