Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b18200a88fd3a7d…

MALICIOUS

PDF

37.7 KB Created: 2020-09-07 10:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 046853051b9e08eff82dc91efdb32c0e SHA-1: 211d47742ce696c7ff399243e7b3de25230c30ea SHA-256: 2b18200a88fd3a7d8eb441a802df6afe95593d2187bd3441640e6b57dd11c266
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same malicious URL and several other benign-looking PDF links, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious.

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.link/wix?keyword=beyblade+metal+masters+episodes In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/23e9be_e09eeb85dcc44d7ab433b8031178eb61.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/086daf_cad9bf8adc2c4a9fb24426eac798e902.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ac51ce_9c7c99ec83c84102818cbcc24a1f767d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/69b86f_fc2220473c644795b226a74c3b6913ef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9494/8517/files/mofatitaxajuro.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c79b1c_5a8a062725cd48a3896a443aae564ca2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4e402_b26739660244455e93619db01dbb34d8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4725f1_e3b670dbad3a44de892d7411362a689e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0251f0_639d49fefd24465fb18a7e82da07255f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c81504_c9e8486075a74cf3b55e6e32e9aa9de5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/70a38d_87ad8c7dd22c40fa901365d6f6733416.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3ceeb9_8ad45d72a7be44c4b16fb63fb5301284.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01e791_bc14388a092b45b5af7a9c8f68280187.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/238140_f95b926be3934ca3a1724de4aff4e14b.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000568c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x568C 5396 bytes
SHA-256: 5e5f013432a9cda41dc016ece745604af0b47722cf98bd47c1c24a066bcad568
font_01_sfnt_off000068cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CC 9788 bytes
SHA-256: aafe01a1397e01f9e41d8df2036fb46bac5023dc03a26a34fa06ad1f20ca73f7

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