Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18dd6fdb930a63d…

MALICIOUS

PDF

51.0 KB Created: 2020-09-01 00:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d46c332e592cc389a7786af110dbba5 SHA-1: cfa1d96219d5810c328bb3c4df76b90afa516e33 SHA-256: f18dd6fdb930a63d073cc27a807cf677436fc1da0b6dd41881888858950b94dd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains embedded links that lead to a redirector hosted on 'ttraff.ru'. This redirector is associated with malicious activity and is likely used to deliver further payloads or lead users to phishing sites. The document body explicitly mentions 'Application form visa korea', suggesting a social engineering lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.ru/wix?keyword=application+form+visa+korea
    • https://static.usrfiles.com/ugd/738632_e2ee9983bb2c4a52b23164185d947bb0.pdf
    • https://static.usrfiles.com/ugd/cf14a4_ee3f47782e514be593c4c3347abdacd7.pdf
    • https://static.usrfiles.com/ugd/b88e3d_06bd6ba03b6945d79d4eff7e95385a78.pdf
    • https://static.usrfiles.com/ugd/097bd5_080156649e1d42569dcc7b5c3478cb55.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/bnz_home_loan_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0440/6388/3429/files/69469089631.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/35919917670.pdf
    • https://static.usrfiles.com/ugd/9b33c5_17657e4c5a154cc19e2b7a99d39ec77b.pdf
    • https://static.usrfiles.com/ugd/529dbf_e757e1906d52495fbb022efb63d77b0a.pdf
    • https://static.usrfiles.com/ugd/cc089a_c2fc0f93ea934f289509b281d118abf8.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_c592797d02af4e7fac890b36ba074e27.pdf
    • https://static.usrfiles.com/ugd/0dd040_1393c674d64742c0a08982905d1ef64e.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ceb.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEB 6744 bytes
font_01_sfnt_off00006da1.bin
39c4fe98479584ab1dac98eb67da0b36d800a07f409f10dd6064d28392ad1192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA1 8832 bytes
font_02_sfnt_off00008a33.bin
d1a5a571fcab3096e1777cdc584da6832368f2cfdaff7717bbea08df6f5229af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A33 5276 bytes
font_03_sfnt_off00009c1a.bin
8fb02e2f8146451a8c3916dcdf239f4e6173e4d1c94e1f4d61570424f49263ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1A 10188 bytes

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