Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1206451e3ce2a7…

MALICIOUS

PDF

37.8 KB Created: 2020-08-29 01:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a4ee1afa6f2cdca3cfd4e8ba0e6643a SHA-1: 17a48e476122252cd04ae171211b50954c521e9a SHA-256: 5f1206451e3ce2a7845350ccc2fa8cb50cf3a0c1a83db5f8be711aadb74729aa
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, forming a link farm. One of the primary links, https://ttraff.com/wix?keyword=diccionario+enciclopedico+biblico+il, is identified as a malicious redirector. The document's structure and the presence of numerous external links suggest an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/wix?keyword=diccionario+enciclopedico+biblico+il
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_4dec8d5a7b7643518844e8243d688872.pdf
    • https://static.usrfiles.com/ugd/b8c837_74ec6464101441d39c153b579341dc39.pdf
    • https://static.usrfiles.com/ugd/b8c837_17312a22054b406fa5f23c80b24b4e05.pdf
    • https://static.usrfiles.com/ugd/b8c837_db9f3a9a24f44c1f9b25eea88cc6337d.pdf
    • https://static.usrfiles.com/ugd/b8c837_277c348a815a48619c48467ffd817073.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb372ff0ee1348b0aebb87c1f0f29cec.pdf
    • https://static.usrfiles.com/ugd/b8c837_84d00b0aba554ca59aefe89adaa1aa86.pdf
    • https://static.usrfiles.com/ugd/b8c837_da91eb6cea424e249b9b5cf871653045.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeaf9351dc864d9ab8b581dbf4d5106f.pdf
    • https://static.usrfiles.com/ugd/b8c837_01dff94f677c43b0b26f763c251e3641.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9535/files/tizatimofalix.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/pipozatebufozunosozapirax.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/saxip.pdf
    • https://cdn.shopify.com/s/files/1/0433/6041/9989/files/32902920281.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005552.bin
74600a9f79d5dddb46535be89fe7c4ffe8811e8df1976e9635f1c96eef8c55d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5552 5028 bytes
font_01_sfnt_off00006668.bin
268dbdc00ccd993d284e0d0508ef5ee290e9463ce722f90afb761de19a085bad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 10248 bytes