Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b4eb7667d07670…

MALICIOUS

PDF

76.4 KB Created: 2020-11-24 08:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 15484ad5b3f016dbe0b40e916c2d1efc SHA-1: 532c4b168962c43a7525a2f7a597c8483ab67813 SHA-256: c6b4eb7667d07670814cd7ec4aa737deb28d8eba06d87c0a6b73ecf6d96fca94
222 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded links, many of which point to redirectors or are part of a link farm, indicating a malicious intent to direct users to potentially harmful sites. The presence of a link to 'gettraff.ru' further supports this, as this domain is known for malicious redirector activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=netherland+dwarf+colours In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5fa2ba0bc2375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fba159e7fc7d.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/3960014.pdfIn PDF document text
    • https://pebuwopaduve.weebly.com/uploads/1/3/4/8/134853156/d272d4d6d0b1db8.pdfIn PDF document text
    • https://tanezogifa.weebly.com/uploads/1/3/4/3/134321065/dizilafusi_daxuwemolusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_5faac2abdf389.pdfIn PDF document text
    • https://lodejudimawepum.weebly.com/uploads/1/3/4/3/134350935/34379.pdfIn PDF document text
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/a989780cba.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://s3.amazonaws.com/kotenu/wadatabokisudi.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/14617384926.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/official_rules_of_card_games.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/3388105268.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/corpse_bride_nightmare_before_christmas.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/best_encyclopedia_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/89408203319.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/lifuweju.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_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 5004 bytes
SHA-256: 85101623f1ffc94b16952a54ab8f1ca4109754e716fd8c944820a0295601429c
font_01_sfnt_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 10372 bytes
SHA-256: 903925a370dd6d86fe135ce877cf52dda55fc17baf73f995968564b1aef72b80
font_02_sfnt_off000116c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C6 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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