Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc09891e4b9a0454…

MALICIOUS

PDF

75.6 KB Created: 2020-11-25 05:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 01d372b20abb4bd6cad5ab70dd1622cd SHA-1: 3bb7db7b79a0bb84433a9af11bd86d703aa41e59 SHA-256: dc09891e4b9a045466e007aec60a16efda1622638b909578ad67228706637ee7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded link suggest it's designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=ap+chemistry+multiple+choice+2014+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391893/normal_5fa021b43c48f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5fa0093eec974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5fa446da50e65.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/5631b922-680d-4889-8afc-359dabf04cd2/14007934057.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/46326977159.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/1515341083.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/cardiopatia_isquemica_scielo.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/jajuwivasipumokinukatad.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/esl_classroom_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/433bb10d-db75-4544-b929-105ce3cab822/beckers_world_of_the_cell_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af19aecf-edd6-4883-bc6f-cc2071b80e17/notodajewiwonetuvijukiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39aa661-1f7f-44d8-8915-a61377f95374/scientific_notation_and_significant.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_off0000dbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC5 5468 bytes
SHA-256: f2b4f95d7fa461496c5f4a1c08857fb2ab3843712702c9867b98ef0e43a218d8
font_01_sfnt_off0000ee76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE76 10864 bytes
SHA-256: 1dcea58ee5f1222982da1f42124ca5be66cb0a1caca17da38226bf1b53dc182c
font_02_sfnt_off0001136f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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