Malicious PDF — malware analysis report

Static analysis result for SHA-256 a487073604b30d86…

MALICIOUS

PDF

68.5 KB Created: 2021-01-14 23:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 98772545709ebe457c08731b3d4410cb SHA-1: 9d434212fd7ad6e733d4b10e1b6a1792c9601974 SHA-256: a487073604b30d86f9d7d4d4e372e7143dfc52df72be9367a8d605daa7be41aa
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=iwata+hp-cs+vs+hp-bcs'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, consistent with 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://gettraff.ru/123?utm_term=iwata+hp-cs+vs+hp-bcs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5fa6ded5451b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452845/normal_5fee12c42673d.pdfIn PDF document text
    • https://site-1083549.mozfiles.com/files/1083549/dowesunojirefixulapaterur.pdfIn PDF document text
    • https://site-1177484.mozfiles.com/files/1177484/diwififodokakof.pdfIn PDF document text
    • https://mowavowami.weebly.com/uploads/1/3/4/5/134591552/sareges.pdfIn PDF document text
    • https://site-1174676.mozfiles.com/files/1174676/zuratafekan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5fd68d8b64e2b.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://s3.amazonaws.com/sitok/company_car_mileage_tracker_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/tezukegelakajekopa.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/chrome_web_store_fr_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/45097551475.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/english_test_level_1.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/11142853944.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_off0000c52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52D 4560 bytes
SHA-256: 9a8292319033a6046df9015eb50f81f4d121f6d536279e0894be93ec41f857d5
font_01_sfnt_off0000d4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C0 10072 bytes
SHA-256: 6f01c699e4b37f9a7910568db7089e686fa3c757de641f07824c2b8f8cf0f9a8
font_02_sfnt_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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