Malicious PDF — malware analysis report

Static analysis result for SHA-256 66cdbf20a1dc3165…

MALICIOUS

PDF

89.0 KB Created: 2020-12-02 23:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 697fc55621fb11becd4deafac320cd70 SHA-1: b5c3b33cadd84ee326a94a580937c5f4ee75691a SHA-256: 66cdbf20a1dc3165279272e26d516c180b5f3abbff926bceba18c3b8fcbcd93e
214 Risk Score

Malware Insights

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

The sample was flagged by multiple critical heuristics for containing malicious redirector links and a large PDF link farm, indicating a phishing or malware distribution attempt. The embedded URLs, such as 'https://gettraff.ru/aws?utm_term=bx8+bus+schedule+pdf', are designed to lead users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and link farm strongly suggest an intent to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/aws?utm_term=bx8+bus+schedule+pdf
    • https://ladasewesadil.weebly.com/uploads/1/3/4/6/134665294/43184c4cb35.pdf
    • https://pinukavuzufov.weebly.com/uploads/1/3/4/3/134307945/pixida.pdf
    • https://juxetume.weebly.com/uploads/1/3/4/8/134879156/8072428.pdf
    • https://wopadutizibum.weebly.com/uploads/1/3/4/3/134306931/1683862.pdf
    • https://viserewisesu.weebly.com/uploads/1/3/4/8/134886384/gajegipubisi-vavufodofonas-laxoralinutirej-nunep.pdf
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/xasujafewe.pdf
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/bafinalowerezuwag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc293a78ef7301f8b1b7b85/t/5fc4362d9b1ed03538627bee/1606694446795/n_type_semiconductor_charge.pdf
    • https://s3.amazonaws.com/tosasugokod/ultimate_mortal_kombat_trilogy_sega_retro.pdf
    • https://static1.squarespace.com/static/5fc11b4016f6d44b07c000b4/t/5fc2ccef5147b148048f6a91/1606601969093/goblin_artemis_fowl.pdf
    • https://s3.amazonaws.com/henghuili-files2/21023019007.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdefd45147b14804f7d594/1606283222096/7936039966.pdf
    • https://static1.squarespace.com/static/5fc2d321f9866f3fd2e0c591/t/5fc5ec29f81c9a2a0c7014cc/1606806569661/javovez.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5e83ca23154c95ac003/1606219243533/need_for_speed_no_limits_hack_2020.pdf
    • https://static1.squarespace.com/static/5fc103f2c6d964583622cf33/t/5fc57e9c1972c46e3c59d281/1606778524188/relurutu.pdf
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc2eea91972c46e3cff55ae/1606610601766/personal_projects_examples.pdf
    • https://uploads.strikinglycdn.com/files/929e8a67-362e-46db-b620-be9d6d670add/tempurpedic_office_chair_tp4000.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e0.bin
5143628f67a7ec0624dc1b2afe235a4b7ddfead8815162ba2ea1985fac3d0edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E0 20432 bytes
font_01_sfnt_off000112bb.bin
2c557f31016e66e781845805026857334ef9e6be232f2f6828d406dd6f24a5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112BB 4924 bytes
font_02_sfnt_off00012387.bin
86cd35af009aed43fec0967827995a29da75605b2da18068c8e9c86daadf81f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12387 10896 bytes
font_03_sfnt_off000148a0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148A0 4324 bytes

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