Malicious PDF — malware analysis report

Static analysis result for SHA-256 755434d670b23939…

MALICIOUS

PDF

76.9 KB Created: 2020-12-28 11:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bddfd0773f76920d42eebf0c2518d1e6 SHA-1: 5e58bf033bd951a3f262d681a9f0299b5d5ec374 SHA-256: 755434d670b239392ed5e16605d5b8aaef01a57e9ef1d5d771d3f301ee7adde3
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/strik?utm_term=general+hospital+news+june+2020'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=general+hospital+news+june+2020
    • https://cdn.sqhk.co/notokulojow/cDjagfh/fariguselemafujikasoxoti.pdf
    • https://veselamo.weebly.com/uploads/1/3/1/4/131452803/nobulamefe-zorel-suvuzaje-jikivavepolu.pdf
    • https://cdn.sqhk.co/lisutovudaf/wgfZSgc/bunozom.pdf
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/2386588.pdf
    • https://cdn.sqhk.co/nunewole/cBdLMid/livree_air_france_flight_simulator_2020.pdf
    • https://cdn.sqhk.co/bafebolabefo/QbvhbLs/dajepazoxebidopavuwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4be31e67-28a6-4afc-901f-c58af021c419/drastic_ds_emulator_apk_cracked_2018.pdf
    • https://s3.amazonaws.com/lijulijowivaze/17237117248.pdf
    • https://s3.amazonaws.com/bupesejirijejus/19847010439.pdf
    • https://s3.amazonaws.com/pegozegi/video_kartun_horor_lucu_mp4.pdf
    • https://uploads.strikinglycdn.com/files/6324e129-4aa7-4f0a-bd67-d9c3aa3b8e98/19465814590.pdf
    • https://uploads.strikinglycdn.com/files/9f749c3b-e0f1-4913-bc57-59685bb8524b/organic_chemistry_a_short_course_lab_manual.pdf
    • https://s3.amazonaws.com/jojitagifuva/tagakumoner.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_off0000ee2b.bin
bdc3a48b98c616b0d3f6fb917fea71e0c53886c9221c82e66708c71af8c45bc5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 5380 bytes
font_01_sfnt_off00010085.bin
33cbea3d7d49289d91dd3be9418242ed379279e0fa936edb825ed20228ea6b2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 11268 bytes