Malicious PDF — malware analysis report

Static analysis result for SHA-256 82050e6b3a4f70f9…

MALICIOUS

PDF

45.3 KB Created: 2020-09-02 21:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d8faa896469f2117591044dfcc2a25 SHA-1: e7142c44160b1a40a642b0e333a849a8fb50ce23 SHA-256: 82050e6b3a4f70f9b1b4a37ed41ab0818be44d1354af9fa21a7283999607fa97
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector infrastructure. The primary heuristic indicates that these links are part of a link farm designed to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=angelic+music+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_b5fbdb21f8294122bed343ea0e67c279.pdf
    • https://static.usrfiles.com/ugd/b8c837_c046e6c9db3f4ae79f7e44e1e978235e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e78df294ef654ab2b940ce7421fba450.pdf
    • https://static.usrfiles.com/ugd/aa14a9_e37c4eeae9a64aab8c3aac994a6d893e.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_fa3747ce8ebc4ae3926ac5bd0bc7b4f0.pdf
    • https://static.usrfiles.com/ugd/685707_dc98ce208c79459a992dc529a63bb2ff.pdf
    • https://static.usrfiles.com/ugd/63d3ad_41834d9f7cd74a55918dec267a936142.pdf
    • https://static.usrfiles.com/ugd/eb4c03_a60e50ec0e014644a8af9a08af7a2092.pdf
    • https://static.usrfiles.com/ugd/ac51ce_eccd2ee255e543a0bed4603460c547e9.pdf
    • https://static.usrfiles.com/ugd/96768c_79ecdb9016524d4f9e700e2d742b5199.pdf
    • https://static.usrfiles.com/ugd/cac9e4_0b36a200a46d4cf3993426770701206a.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_82e60e8257ea4eb0a7ecb4f038192f42.pdf
    • https://static.usrfiles.com/ugd/73c254_ebb56c49b4d941f981c68e962d2cf9d1.pdf
    • https://static.usrfiles.com/ugd/cb2bed_a665fa10e4b1442b9ca143d26ce46153.pdf
    • https://static.usrfiles.com/ugd/71fd01_3944c806e405485fad0387645c45e107.pdf
    • https://cdn.shopify.com/s/files/1/0431/2825/8726/files/ratasitufosotelutu.pdf
    • https://cdn.shopify.com/s/files/1/0458/6573/0201/files/44765360194.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/d-_link_wireless_dwa-_525_driver_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/37678241138.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f7.bin
f8f8e4322b224cb051b3b24e752cfc931dd06c5d4e4d7685fd3a5c188d9ce2a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F7 4672 bytes
font_01_sfnt_off000076b7.bin
0fbacd42847ba916178d137ffdbb69b447029068802b8ac646805bcf3cf691ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B7 10256 bytes
font_02_sfnt_off000099d5.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99D5 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.