PDF malware analysis — malicious · d3d75b4dcb28ec5d

MALICIOUS

PDF

40.6 KB Created: 2020-08-09 05:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9df99bb8fb3102a49fd3413c2bb63b58 SHA-1: 0f67441ad000d5662467e7c6b4c30182ff5bc4a0 SHA-256: d3d75b4dcb28ec5da1b285c45ca7be6a94f33f1ae9d365d15823fbd4d423242b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as educational material, aiming to lure users to a harmful website. The document body, though partially corrupted, includes the primary malicious URL and numerous other URLs pointing to PDF files, suggesting a link farm or content-loading mechanism. The ML classifier strongly supports the malicious verdict.

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.cc/wb?keyword=fill%20in%20the%20missing%20number%20multiplication%20worksheets
- http://files.davidkaplinsky.com/uploads/1/3/1/1/131164295/c4ee7caa10872c.pdf
- http://files.kirklandadventuregscamp.com/uploads/1/3/1/4/131437671/jimiz.pdf
- http://files.sunglassfilms.com/uploads/1/3/1/8/131857494/likid-fuzulomazuzo.pdf
- http://files.withthesehandsmj.com/uploads/1/3/1/4/131438509/matavokefubena.pdf
- https://cdn.shopify.com/s/files/1/0427/4552/8487/files/adobe_photoshop_cs5_learning_guide.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdf
- https://cdn.shopify.com/s/files/1/0429/8424/3363/files/wausau_weather_radar.pdf
- https://cdn.shopify.com/s/files/1/0428/0070/9791/files/wisidonopabugeboramela.pdf
- https://cdn.shopify.com/s/files/1/0431/4854/2109/files/pezem.pdf
- https://cdn.shopify.com/s/files/1/0437/0835/0615/files/impeachment_process_worksheet.pdf
- https://cdn.shopify.com/s/files/1/0437/9164/6880/files/100_years_five_for_fighting_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0430/0275/7281/files/30602265800.pdf
- https://cdn.shopify.com/s/files/1/0435/2029/5064/files/48996501455.pdf
- https://cdn.shopify.com/s/files/1/0427/3248/6823/files/metal_gear_solid_rom.pdf
- https://cdn.shopify.com/s/files/1/0432/4337/2703/files/php_get_class_name.pdf
- https://cdn.shopify.com/s/files/1/0431/2583/3882/files/sefalatek.pdf
- https://cdn.shopify.com/s/files/1/0435/6977/4750/files/86549924137.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_off00005fc8.bin` `e5c48f3be9cfacf56a87ea9c1a50d83d77e83dd6d3f1f187f4c745d1bcaab877`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FC8	5600 bytes
`font_01_sfnt_off000072b7.bin` `c6f905779b91374df3cf3839f58de0943269a8ad5ff17441da5989bb47ea7a1d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72B7	9884 bytes

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