Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c874f4314d76b08…

MALICIOUS

PDF

46.7 KB Created: 2020-10-04 05:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d7eef0ab5404d7779a7e4450e8854701 SHA-1: e7bf5bd1341bf0b653b3d1bbce84a9ec1f5c751b SHA-256: 5c874f4314d76b087865f1dda7466bf58c5df88806dd646fac7971c2d55c2ff8
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, likely as part of a phishing or scam campaign. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the presence of numerous external links in the PDF body strongly suggest this malicious intent. The ML classifier also flagged this PDF with high confidence.

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/pify?keyword=gerber+06+manual In PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/xezuzebavov.pdfIn PDF document text
    • https://site-1039381.mozfiles.com/files/1039381/joropuzoribolulepo.pdfIn PDF document text
    • https://site-1039828.mozfiles.com/files/1039828/61069558555.pdfIn PDF document text
    • https://site-1039621.mozfiles.com/files/1039621/tagebenekuzisogegulegum.pdfIn PDF document text
    • https://site-1039813.mozfiles.com/files/1039813/xadusetusajolexowutin.pdfIn PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/82215277344.pdfIn PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/37232221692.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/rupuvoribatilin.pdfIn PDF document text
    • https://site-1038387.mozfiles.com/files/1038387/kibatazemetakajafi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4227/8042/files/waterville_junior_high_honor_roll.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/t_shirts_with_sayings_on_them.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4725/0837/files/9655586111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/64694971108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37743d23-bf98-4cc4-bc04-5dd1c9710e16/nosuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debf6106-46ae-4c83-baf4-541e92d152f9/koxewipuvexix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000658a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658A 4764 bytes
SHA-256: 94774018758b8f126cddd547a1618e73a5f75d864dcc7596e87c2567a5582a9d
font_01_sfnt_off0000758f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758F 13268 bytes
SHA-256: f9ce2b55199e0dda7a7089bec04dfd2e3960d93063a7a8ad14ac9a9bd0fdb813
font_02_sfnt_off00009fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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