Malicious PDF — malware analysis report

Static analysis result for SHA-256 18527787ba260aab…

MALICIOUS

PDF

71.5 KB Created: 2020-12-26 20:03:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c9b39ec21795e73681038fd37b06fe3a SHA-1: e37821e6a50ee86a4d02902c7ab8e9805ed35a59 SHA-256: 18527787ba260aabde1e129a921939d7726f7dacd97758a9fe8efd4479bd3f12
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://traffmen.ru/aws?utm_term=nomao+camera+apk++aptoide+iphone, is the primary indicator of this malicious activity. While no scripts were explicitly extracted, the nature of the PDF and the redirector link suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/aws?utm_term=nomao+camera+apk++aptoide+iphone In PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/fniG2gg/seluxavurab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5f9c8850290b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5fe3e83a5900b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457312/normal_5fe45711b0fff.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/jcJijig/mineral_fusion_mascara_lengthening_rock.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://uploads.strikinglycdn.com/files/e079b18d-22e5-4fff-abd8-4164546306d8/27708293430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6036d238-a840-4a3f-a6e0-81acd983e5f3/41561910809.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/xuwabevigigurutupelatile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4171ee36-02cc-4623-9316-ef8d7573a16b/beaver_lion_personality_test.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/wapasaw.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/visual_studio_android_emulator_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/kudarixatisuwaniniwepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c2418f-c0bd-440d-bfa3-6d07dc7943b5/xokaduzurororimokok.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/translate_chinese_to_english_free.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_off0000cd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD98 4924 bytes
SHA-256: bf4a42538affb5d568051578c667c515b4a9ed2e88f5f7a545ebb7d2b5d5b528
font_01_sfnt_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 10996 bytes
SHA-256: 89e19bb748febe4c12e863fb645ccd9f3dadbae43b19309cb20e409eeca37852
font_02_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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