PDF malware analysis — malicious · 32de2b2fb0c5639e

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 01:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ae053fb1b1daf732c21e3ed29ae2f372 SHA-1: 3d9c13266a5e4c3a858d925b034ed0ceaab5278a SHA-256: 32de2b2fb0c5639e669caca97d2de4abb31250ba21ffb6e804c1af9ddf4da1c5

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm. One of these links, 'https://ttraff.ru/pify?keyword=esc+pocket+guidelines+atrial+fibrillation', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect users to malicious infrastructure. 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.ru/pify?keyword=esc+pocket+guidelines+atrial+fibrillation
- http://ronapawu.charlottebrady.com/uploads/1/3/0/7/130776644/dowamisuzazagivo.pdf
- https://cdn.shopify.com/s/files/1/0437/7945/7175/files/64888644325.pdf
- https://cdn.shopify.com/s/files/1/0431/2665/3077/files/accidental_racist_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0431/4926/3005/files/mesogokudanupav.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27039997465.pdf
- https://cdn.shopify.com/s/files/1/0433/7103/6822/files/xiroxoxukexiwulo.pdf
- https://cdn.shopify.com/s/files/1/0464/6885/8024/files/ketol.pdf
- https://cdn.shopify.com/s/files/1/0436/9114/7417/files/nusuluzewuzuji.pdf
- https://cdn.shopify.com/s/files/1/0440/1161/8462/files/tinkers_arrow_shaft.pdf
- https://cdn.shopify.com/s/files/1/0431/0063/5290/files/applied_multivariate_statistical_analysis_free.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23582012054.pdf
- https://cdn.shopify.com/s/files/1/0431/1223/5174/files/fabotepojixogebutiwoxe.pdf
- https://cdn.shopify.com/s/files/1/0431/0990/8637/files/lamevutiboravuvize.pdf
- https://cdn.shopify.com/s/files/1/0428/9665/4499/files/70431945717.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006157.bin` `25ec1c1f70e1668cdd54e105541f18baa4056785e09db25cb9d0d1f86d01366f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6157	5368 bytes
`font_01_sfnt_off0000739f.bin` `78a98b7962dfa90122e4fc07612aed964cf2a1f5449c54576855adb522097d6f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x739F	9868 bytes
`font_02_sfnt_off00009562.bin` `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9562	4324 bytes

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