Malicious PDF — malware analysis report

Static analysis result for SHA-256 06279d8027893216…

MALICIOUS

PDF

40.4 KB Created: 2020-09-12 06:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0eac1c803074a94aec5b384a2d0f9e11 SHA-1: ba8ca291d217435e6a1aa750ec793116e511ad63 SHA-256: 06279d8027893216ccc7a93907e2961458ff6583f30198770d93a9a2f9bc35b2
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a 'polycet 2019 hall ticket'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. The document also contains a large number of links to external PDFs, suggesting a link farm or redirection attempt. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link strongly indicate a phishing or redirection attack.

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.link/pify?keyword=polycet+2019+hall+ticket In PDF document text
    • http://files.ibomusicalvoyage.com/uploads/1/3/1/4/131453198/dekafode.pdfIn 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/162fe6_960f25ddc70e4de6b0260fccf3062169.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3de8a6_b48ccab9d13249f58f8c381b98eae810.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7a13df_cf0193d008214d8683b74b02d2ce6ce6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9bd8c3_385e1e64162a448dac5a2cf63f1f98de.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e79a6_5e6c4125e4a446e688ed3f10b8df720f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7a7fb1_1309002a8efe4f73827afa8c3be41b2a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d61b30_e8ad1d975f1b4ec984d07a212d8be40c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f4de5e_d08267063a0541d8bfc3c10c39209804.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e32576_a0f24775b8064a088cfec98b3224d3e7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/017c44_e39b01fecbaa4e629373e726f28d600f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8dde66_8eb373d5a2f44187ad004dab25723f49.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_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 5264 bytes
SHA-256: daf84db2e2b30ae6ff38b8299c4af7b70e32fe5153c6618cc8d9f48934de31d2
font_01_sfnt_off00007375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7375 9704 bytes
SHA-256: c085fe017145cf0943692300b94a916c619ed5ef50b9492031921634ce39f185

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