Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdb8d89fc0a5959…

MALICIOUS

PDF

39.9 KB Created: 2020-11-04 10:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 610be589803ad7d8e78fb490a9503fa0 SHA-1: 2846f8f7a6ec92c40c6abdff214aaac54b9a69f1 SHA-256: abdb8d89fc0a59591e2ed4030ed18d50f054676f1496e34f2b1ad44f63929eb2
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains references to payment redirection lures and social engineering tactics like instructing the user to press Win+R, consistent with ClickFix attacks. The presence of numerous embedded URLs, many pointing to link farms, further supports the malicious intent of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://ggtraff.ru/123?keyword=windows+xp+change+password+command+line In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5f8ff9c6ddfff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5f8b24a796bfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_5f9a3be0c5be5.pdfIn PDF document text
    • https://jedotulaxadetin.weebly.com/uploads/1/3/4/5/134587896/tanagusakozo_torabixil_lisoz.pdfIn PDF document text
    • https://zemexiwum.weebly.com/uploads/1/3/4/3/134330210/fusom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422392/normal_5f9e1ffc269e3.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/tobujeri_jejasupenalifo_supipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f8dbf1d48083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_5f8dd1abc0b21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/9477077608.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_off00005d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D43 5660 bytes
SHA-256: 283ee9c179598db81555c29ee672d752f51728bfb81497b15118fc5662a72f7b
font_01_sfnt_off0000707a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x707A 10188 bytes
SHA-256: 29afaef9089e4eea9b56d671d764fc3887462d0ac1b6bcb0353f359110c56f2b

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