PDF malware analysis — malicious · d591bde1508197cf

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 12:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9b6ebf89f8c80600acbd5c22682eecfc SHA-1: 4cf087ac3af4c5c8396379b6831a47435ec46cc9 SHA-256: d591bde1508197cf9db30cef7e05e2eb0d7968d229ac77b970a4fb28e6939221

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=arithmetic+sequence+worksheet+key', suggesting a lure to disguise malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=arithmetic+sequence+worksheet+key
- http://jogavukap.wickertmath.com/uploads/1/3/1/4/131483492/nenip-bipugomili-tovafasuzevuzol-xeguteret.pdf
- http://files.edenbridgehockeyclub.co.uk/uploads/1/3/1/0/131070313/rijozewaluwuja.pdf
- http://files.starryeyesmicroblading.com/uploads/1/3/2/8/132814343/6b27c33c5a35fe3.pdf
- http://jatakox.neoes.org/uploads/1/3/2/8/132814930/morejanadejekan.pdf
- http://files.aimeespetcare.com/uploads/1/3/2/7/132710627/1cf7ec6f6ce27.pdf
- https://cdn.shopify.com/s/files/1/0431/3477/9553/files/44797371390.pdf
- https://cdn.shopify.com/s/files/1/0432/4586/3067/files/28021612083.pdf
- https://cdn.shopify.com/s/files/1/0432/2030/4034/files/bise_fsd_9th_result_2020_download.pdf
- https://cdn.shopify.com/s/files/1/0430/5128/6690/files/zumonobowi.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
- https://cdn.shopify.com/s/files/1/0434/2795/4853/files/g_eazy_random_download.pdf
- https://cdn.shopify.com/s/files/1/0431/3418/9734/files/33667224243.pdf
- https://cdn.shopify.com/s/files/1/0437/7575/4389/files/algebra_questions_for_grade_7.pdf
- https://cdn.shopify.com/s/files/1/0452/1931/5872/files/fewuzulofaxafaduf.pdf
- https://cdn.shopify.com/s/files/1/0438/1124/2144/files/73516656020.pdf
- https://cdn.shopify.com/s/files/1/0428/0070/9791/files/40676828734.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_off00006cb9.bin` `01179be6a9d74437ba8ad22828c6bb49b1f716d40b0a14df344f535dbdcdfcae`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CB9	5168 bytes
`font_01_sfnt_off00007e48.bin` `5fa1df90751b147c7ac4a770b8505a73a7845054e216857bc218d496b44c7682`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E48	10204 bytes

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