PDF malware analysis — malicious · 77d26c4c278f39bd

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 08:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 182eddd71e1343a2841da47d9aeaee5f SHA-1: 98cfe477385ae436405d708dbb5633562eeaa281 SHA-256: 77d26c4c278f39bdd650fdfe905435c8176116d41075855f482247bb8844506e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.cc/wix?keyword=mai+teri+chunariya+lehrayi+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are to benign-looking PDFs hosted on static.usrfiles.com. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of embedded URLs and the link farm behavior suggests an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9891

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/wix?keyword=mai+teri+chunariya+lehrayi+free
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/1decf9_8a6b3e58189649a28cd17a3e30407fa7.pdf
- https://static.usrfiles.com/ugd/b8c837_0836d67a8f4d44f3b6cb6f24127c3f4d.pdf
- https://static.usrfiles.com/ugd/a2ebd8_6adec540340540f681fa91897fdbeec2.pdf
- https://static.usrfiles.com/ugd/b85eb0_8536716b5c734c21a8b8b67bfa335fa9.pdf
- https://cdn.shopify.com/s/files/1/0440/4399/3238/files/wugakisomikewezoke.pdf
- https://cdn.shopify.com/s/files/1/0427/3196/2535/files/20418234837.pdf
- https://cdn.shopify.com/s/files/1/0431/7125/0336/files/dirk_gently_s_holistic_detective_agency_download.pdf
- https://cdn.shopify.com/s/files/1/0463/4935/3122/files/ranogexomiletiwexoredur.pdf
- https://cdn.shopify.com/s/files/1/0430/9316/4199/files/brahmanic_and_shramanic_political_thought.pdf
- https://cdn.shopify.com/s/files/1/0431/2514/5760/files/suwapewuzuxedomatevamom.pdf
- https://static.usrfiles.com/ugd/d99ef3_cb7fd2bc118a4f2bbe8d7d44d2d94ded.pdf
- https://static.usrfiles.com/ugd/b8c837_a573635522b04c1a9b154a6f71eb4ae0.pdf
- https://static.usrfiles.com/ugd/69b86f_d87e171114184d2f9981aae67dc1cb24.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005f5f.bin` `609d66e1f70f8cce7f9b92f2fe978dd784c8340d217ae8ac824f74b0c8bf5a67`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F5F	4896 bytes
`font_01_sfnt_off00007015.bin` `9989cd9f321fb20157c812a4104c33ad91f1552161d507a7b5ae2d0b96685bc2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7015	2424 bytes
`font_02_sfnt_off00007999.bin` `cba1c197b994a02735f9b4ea3517a9c9febe9eb9069f4a198fa4f014d038d049`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7999	12032 bytes

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