Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ff3db96eb2fe90…

MALICIOUS

PDF

40.2 KB Created: 2020-09-06 13:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0ca15c788f7d34deb009a52982aee71e SHA-1: 6c9995b7500fac3f29a26fd56b1875e207fb309c SHA-256: f0ff3db96eb2fe90e9918039c14a2aa799bf02a45ad5ea63f56656a2a039bf2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, many of which point to external PDF documents. One URL, 'https://ttraff.cc/wix?keyword=sample+accomplishment+report+in+english+club', is flagged as a malicious redirector. The presence of numerous links suggests an attempt to manipulate search engine results or distribute further malicious content, aligning with SEO link farm tactics.

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=sample+accomplishment+report+in+english+club 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/a59130_049dc6ae521648fcb2ad8fbe6d0a576d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/70a38d_1035d8690b5e4edabc019f7b2c6fdd5d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0c4177_da7953646f0146a9be5dd840a87fb5e5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0b46e6_cea712b1692947bbb6620a9312380386.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0df15e_dc8e2b0a49e545c58fdc5a11a6402a2e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0c41e7_14f899473ff54894a94335b035c9dc00.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/299074_319b5b1a3df9495d9f7905f573867ee0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_09019ddf907f4121ab5fd2c0154ea5a8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/162fe6_9fff4284d3c54a1b927f0018e5479ad0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e56fe2_3e5cd28ab4bd4b69b853d10326158f50.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/48d9a1_4e2a3e9b95e54233b91f42929d25442f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/409ca8_da37c76a30224d99a038940600b84979.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c618e9_04e8c25e7cb84a16a82024875991fd11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/21440075660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/16518790185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/ganalupakaloraluxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/79694090728.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_off00005ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED6 5592 bytes
SHA-256: cd392f6e48188b8f35c55f2b78bc7e7043707032d14338ba9f5646313aebf623
font_01_sfnt_off000071a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A6 9924 bytes
SHA-256: a1686cc3c4500c0d6c57635c1331de67963241e9f929061cf59611b1c874261a

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