Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba7968f4360c687…

MALICIOUS

PDF

78.5 KB Created: 2020-12-25 01:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b06be7910a5e52bd1da21ad4a4e3222a SHA-1: 841e4257b0e60deb99e4bf54fd0fb07cc4221fea SHA-256: fba7968f4360c687be584c7401dfc1b0503014de141a6597bf4f89fde05558c5
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/aws?utm_term=analytic+geometry+ebook+pdf'. This URL is likely used to redirect the user to a phishing page or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a document disguised as an ebook suggests a phishing or malware delivery attempt.

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/aws?utm_term=analytic+geometry+ebook+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5f99ea63adb9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449603/normal_5fe02033d6f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_5fa86437768df.pdfIn PDF document text
    • https://cdn.sqhk.co/tamikoveken/gfuicju/ez_loader_single_axle_trailer_specs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_5fb62dcb65a07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f9174fdd00c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_5faaaa5f1039e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417318/normal_5fbbff60182b9.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/zarusegibitumet/buvugul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0aa4a27-aff7-483a-aeab-2c8f29046879/28155827081.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/bevusenuzudogubeluzumuz.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/50038476321.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_off0000f35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35A 5592 bytes
SHA-256: cb9a21cfc1a2d6171f3ebca8ec2c77982d7fbf6087a251c01fde8a22b41ddd4e
font_01_sfnt_off0001065b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 11492 bytes
SHA-256: 1e1d4a150a0d15100eed6d6c449166f8cffa752d3b46ac52ce93965318ac4c90

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