Malicious PDF — malware analysis report

Static analysis result for SHA-256 226d999899f5b81c…

MALICIOUS

PDF

66.9 KB Created: 2020-12-17 00:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0722978655cfb99f3e729af66debadc6 SHA-1: 7906f2f9a7e91ec9067b3d6f3287b230e9640b61 SHA-256: 226d999899f5b81c249fca80de70a2104b2225b4b2440ccfde0ecc072d7b4dbd
154 Risk Score

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=baby+red+deer+called'. 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

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=baby+red+deer+called
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5f9e92cf04525.pdf
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5fa0c127518d5.pdf
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/paxukekabejodifewara.pdf
    • https://xelipifexejup.weebly.com/uploads/1/3/4/8/134848770/vuwajeromidi_mevimezemeze.pdf
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/4e3cf21244a.pdf
    • https://bulipegorevuju.weebly.com/uploads/1/3/4/7/134700868/9021f9a2797a3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0c6a4a87939686407af5f/t/5fc0f8829ee0f32b877589be/1606482051039/57508391491.pdf
    • https://static1.squarespace.com/static/5fc00874a5bc066edfa0f7a0/t/5fc15a869b1ed035380e755b/1606507143416/59943517105.pdf
    • https://uploads.strikinglycdn.com/files/33d6c57c-8d94-412d-8ff3-7d688cc19c28/wild_boy_of_aveyron.pdf
    • https://uploads.strikinglycdn.com/files/f6b949a2-1047-4867-a5d7-1b393c6e6647/1_4_5_piano_chord_progression_chart.pdf
    • https://static1.squarespace.com/static/5fc38de88787e879897caab0/t/5fc62c4af3de5e49b537c6bf/1606822990075/10043971670.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb98.bin
51268410f621f55e9accac17cb3a21a3f61064f19deafa0f2279b6654452f5c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB98 5044 bytes
font_01_sfnt_off0000dcd0.bin
3d6bae835679941af8b7b50133986d768d5bab104829f50f3a5c0bbc0b44f1d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 10012 bytes