Malicious PDF — malware analysis report

Static analysis result for SHA-256 242d9356fa24777b…

MALICIOUS

PDF

41.9 KB Created: 2020-09-05 22:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8781119c09519eaf89d64fca50e7ad8a SHA-1: 227c39abe04d56aa623229e89340bcb8a5030f79 SHA-256: 242d9356fa24777b3d9d87a7dcb1e94a995d8a58cbe799b3a2bd22d28f6de8ce
154 Risk Score

Malware Insights

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

This PDF file contains a link farm and a redirector to a URL that impersonates a software installer. The primary malicious URL is https://ttraff.club/wix?keyword=chrome+for+windows+8+offline+installer, which is likely intended to trick users into downloading malware. The presence of numerous other PDF links suggests a link farm used for SEO manipulation or to host further 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.club/wix?keyword=chrome+for+windows+8+offline+installer In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8181/0595/files/1079455666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/nawabudigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/pozagugotuzatevarotevojom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/87904851492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/36479682577.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3f4b99_4cb62c0355a54d3ca68dfd850a457d2d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2618/4349/files/37756958066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/20539454497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9308/files/80263221909.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_805e221dfd6a40e4951b39cd64c7af27.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ba3095_fdd2fe1afd9c4acbb11084b75d95b6d1.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_off0000631a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631A 5336 bytes
SHA-256: 8a357ee3d33b789a3407330aa16261588875349ee55e1bc37e9db3554bdb0720
font_01_sfnt_off00007522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7522 11680 bytes
SHA-256: 36ee62e36899dd24588c024b7c7eef8ce0c39b7bba5fc9a2c35e5ef69ae71979

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