PDF malware analysis — malicious · b76766d36a3267a9

MALICIOUS

PDF

41.9 KB Created: 2020-08-01 15:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: be823d3449a0fc924177943f74fb0c69 SHA-1: bcf92f5255957e03bb98a7b45d0c87a1cd076999 SHA-256: b76766d36a3267a9d4c7bed735e2ece09f162f40b2486b9cae0b63b98720f33d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high density of external links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=skyrim+legendary+edition+strategy+guide+pdf'. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, reinforcing the lure. 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.com/pify?keyword=skyrim+legendary+edition+strategy+guide+pdf
- http://files.djmarshallgroup.net/uploads/1/3/1/3/131398323/depapufexiw.pdf
- http://files.jacidepuydt.com/uploads/1/3/1/3/131398573/14c82cefa3acfae.pdf
- http://files.forexminority.com/uploads/1/3/1/8/131871433/b9598d50a7.pdf
- http://files.oneilljamesschool.com/uploads/1/3/0/7/130740524/539f13a13.pdf
- http://files.nolartslearningcenter.com/uploads/1/3/0/8/130873820/libinanaxefij-lavojozu.pdf
- https://cdn.shopify.com/s/files/1/0438/4597/6224/files/bezika.pdf
- https://cdn.shopify.com/s/files/1/0437/0379/5865/files/renamedox.pdf
- https://cdn.shopify.com/s/files/1/0433/1234/9334/files/61526983683.pdf
- https://cdn.shopify.com/s/files/1/0430/5531/7149/files/40906056764.pdf
- https://cdn.shopify.com/s/files/1/0430/2897/1681/files/37544605683.pdf
- https://cdn.shopify.com/s/files/1/0437/7985/0398/files/43630188116.pdf
- https://cdn.shopify.com/s/files/1/0429/6821/9799/files/nixozusuf.pdf
- https://cdn.shopify.com/s/files/1/0438/4368/2469/files/77765031863.pdf
- https://cdn.shopify.com/s/files/1/0431/7259/3832/files/36537545280.pdf
- https://cdn.shopify.com/s/files/1/0436/9842/1913/files/fatugonilodi.pdf
- https://cdn.shopify.com/s/files/1/0432/2761/1295/files/99694993963.pdf
- https://cdn.shopify.com/s/files/1/0428/6971/9196/files/vusafosakitozafij.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_off00006491.bin` `9e044a6d9d1acdfd3547e0e1611ed9ae074d96e8b9d689eae75a4d307ce81f71`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6491	5628 bytes
`font_01_sfnt_off000077ac.bin` `f52e759f998b777fb303390227277e5e59d281ab517b6ed35947f961ec264a22`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77AC	10240 bytes

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