Malicious PDF — malware analysis report

Static analysis result for SHA-256 17df3616b9516a3c…

MALICIOUS

PDF

42.2 KB Created: 2020-10-31 00:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 768edca0cfb3d50bda44f3d41098495a SHA-1: 9bebb8ee029bc43853294e7ea93885c7d71b2df6 SHA-256: 17df3616b9516a3c00a88763e18659ba93010b20b8bdcbea3a9a4ccd191c8a70
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://ttraff.me/123?keyword=lesson+7.3+skills+practice+a+rational+approach+answer+key In PDF document text
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/wukowujipud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f884d94accae.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/5882351.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gajejasa/junior_in_high_school_age.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/mount_wilson_ranch_ghost_adventures_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f29ad3-8a23-476e-8658-1a130a2f6c8f/liguxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee54c02e-0bde-4195-a098-4576fd6c23c3/hamilton_brewstation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4023dd3c-9926-43d0-b5ce-33a30b652b4c/28053305024.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/tribology_bearing_design.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/cae_exam_practice_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140c84fe-d471-40a6-838e-1eba25fe1a4b/6968029546.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/pluralisme_religieux.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/understanding_comics_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000676d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676D 5496 bytes
SHA-256: 1f31ee6d7d9269b176819af0b199b4db3ee7fa563449a375a80f13396e58529b
font_01_sfnt_off00007a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3F 9604 bytes
SHA-256: adf6693cecaac31ececa2f5b61dc712d924e247e052e4a6a0e45d10059843069

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