Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46ef47a06fc94dd…

MALICIOUS

PDF

82.1 KB Created: 2020-12-15 04:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 240b89ca4b35f39b2ae8590876e2bda9 SHA-1: 79bf53f6986d30aa77ac0aca0d1fdbdd1eb6d77b SHA-256: d46ef47a06fc94dd3e401030973b9e3b1e641b408b523e24442833383128e27d
214 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically `https://gettraff.ru/123?utm_term=arabic+alphabet+worksheets+printable+pdf`. Additionally, it hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=arabic+alphabet+worksheets+printable+pdf In PDF document text
    • https://lepuzabokagat.weebly.com/uploads/1/3/4/3/134333079/wegigozupesukobisu.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0827de.pdfIn PDF document text
    • https://tagufonatudivar.weebly.com/uploads/1/3/4/6/134609106/xoxapezotak.pdfIn PDF document text
    • https://kipunokazapalu.weebly.com/uploads/1/3/4/7/134774983/xefixivanezum.pdfIn PDF document text
    • https://gonupedifi.weebly.com/uploads/1/3/4/5/134524362/lonenik_migarego_zobusan.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/vector_calculus_marsden_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e07cfb-640c-4703-81c7-f7026bf85a0a/33049845785.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/81142824338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e871fbe2-c8d5-4174-8f7e-57df1e24e14e/reluwis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe7cff2-96de-4644-8508-de979704390b/83442433679.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/christiane_f_movie.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000d6b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD6B0 13464 bytes
SHA-256: db798f6e31a320d2299e943eb9c78c328edea585d97a614fd54e0c4299b14d72
font_00_sfnt_off0000c3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E5 5528 bytes
SHA-256: c9d321d8447de22e86d5c49a5a2497c990a3bacef6e43b75ca7871b150df4fcc
font_02_sfnt_off0000fcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEC 10824 bytes
SHA-256: 0776a56f635831fdcde79b9fba09783097bb73bb71846321f36f60806f24dbba
font_03_sfnt_off00012234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12234 16248 bytes
SHA-256: 31dbf832b4820e5395e006ebdca06903b8f7c13b2874c1c58fa98a85777c6ea8

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