Malicious PDF — malware analysis report

Static analysis result for SHA-256 75874df7058ea06a…

MALICIOUS

PDF

49.2 KB Created: 2020-08-29 18:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f587bb1fccfb9ea44bba30e5c5bcc8ec SHA-1: ef60d6e02750395dc336ebbe356a0eee4e240896 SHA-256: 75874df7058ea06a36af18140da806e0c5634579cda47531c2faf9f29e37391a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/wix?keyword=disciplinas+relacionadas+con+el+comp. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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=disciplinas+relacionadas+con+el+comp
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_344417b15c694c8ab78c02c761c291cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0e53a41712345eca713275e1cb4fd1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd03e560193044e4bcfee886cde2587f.pdf
    • https://static.usrfiles.com/ugd/c12414_48d17cdaf18b4dc89437fb0137bcb224.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc25af426ad04839a74d89c065067bb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4148a22767949aba5674d5d8efd6834.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fe4806c12d940f59fa3b05f91102399.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/puxasebuwojepaberorav.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/77455719714.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/tonageloduralixef.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/32618938596.pdf
    • https://static.usrfiles.com/ugd/e745be_afcfb74b971d45d1ad0f8ca2f110ea11.pdf
    • https://static.usrfiles.com/ugd/b8c837_86950234a288466887e3b9a65bb12015.pdf
    • https://static.usrfiles.com/ugd/b8c837_f20e34dc86bb4b579029d044e266d776.pdf
    • https://static.usrfiles.com/ugd/b8c837_543db91c33644cff86472327345cd088.pdf
    • https://static.usrfiles.com/ugd/b8c837_47b01ea49aa74de1afedc2d82526b3a0.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_off00007fa2.bin
11bb91870b03a231b7f8f55be78f8a840ddf74ce0a24599b4e3ead6bcb4e7397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA2 5220 bytes
font_01_sfnt_off00009138.bin
27e99d0d84148f8e30b4f792377e3d1f6244fa3f45f7e0a432ae2cd3cf8ef873		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9138 11492 bytes

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