Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f46a5b0307dc752…

MALICIOUS

PDF

37.7 KB Created: 2020-11-04 11:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 85c50814829dc46d00f4a7cfbb3233bf SHA-1: e1abc7e1bfb83c218c9dbac3388b8ccd04d46477 SHA-256: 2f46a5b0307dc752f9848e8e61b447a9df28c374321ec00983edc23032a6ed12
114 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to redirect the user to a phishing or scam page. No scripts were extracted, limiting the analysis of specific execution chains.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?keyword=pembina+gorge+atv In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1637704d-5671-4538-b72d-347d81129c37/zuxufopewutup.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/xowimuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0288c12e-cfee-4dba-bdba-6d0bd24fb767/legidosexenum.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/paula_jai_parker_the_summoning.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/adobe_acrobat_x_pro_convert_to_word_document.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af27c60-8633-4061-bc32-1de48f397985/35590695107.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/stats_sa_census_2011_results.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/75775109308.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/101_amendment_act.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/27077497267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce4e19a-7e6c-4591-bfe1-917ab066beca/zomuzimifef.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/candy_drawing_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77a0e82-dffc-40b6-98cc-81c4c6d83dc6/xajupefeninuserepewubiwij.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/kotelopanexilaxapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d280f9-0f5f-4f53-abe0-4da9046e44a9/24030804868.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_off000053be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53BE 4996 bytes
SHA-256: 11c33354ce99db663885aebdca303c2f9b75764bd605f081d2e24388cc4baea8
font_01_sfnt_off000064b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B3 11212 bytes
SHA-256: ef81093233a8b96c1e64aa535856ace4e6b45340c4da3e91e296bc506be14ff5

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