Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad0d21be68e9f99…

MALICIOUS

PDF

39.0 KB Created: 2020-09-07 23:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a97b3b1b5ec7490612e1f19680262abc SHA-1: 2e421a355e8463c80eb93a3ede1b057d869c97ce SHA-256: 8ad0d21be68e9f996d3752573553c074327d2be0140523389662b1fb310d7329
154 Risk Score

Malware Insights

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

This PDF file contains embedded links that point to a known malicious redirector, specifically 'https://ttraff.club/wix?keyword=crontab+format+to+run+every+hour'. The document body, though heavily obfuscated, contains references to the same URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous other PDF links further indicates a link farm or redirection strategy.

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.club/wix?keyword=crontab+format+to+run+every+hour 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/2eedf1_d9a0573f9a3d48ce8d9c0318c0573045.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f96b02_39d6284cb4d74639b96879b28d76a86d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b54ff4_8b40764bca9442ec8e1916911b7191cd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e4f7ac90e6dd4d6b9195487a5d661922.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0f5b72_d932ec97e29145f08449c6e932d7a250.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/24853a_31a2261661b54928a91b5deab7397327.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_84e7eea281714fa3a1c0a06a05a3401c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_79d18a12e5bf4706bb62bc5982b6810e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_320fc05b690a4259b734d9da7234c625.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/19103d_ada491408b844503a1464cd8f5935cbd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3846/6208/files/bitlocker_to_go_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/potopeseporugenodobafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/tewovuxologonozibobatero.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_off00005ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE9 5004 bytes
SHA-256: 39c8531d6229a524afd96650bdc758968853bce18015bcfd608c99146beb405c
font_01_sfnt_off00006bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD3 10380 bytes
SHA-256: d27cc51a62f35dcf5fc531938f01d845cc65f9fd35023cbce7e4b6aad3362d14

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