Malicious PDF — malware analysis report

Static analysis result for SHA-256 882d937d5cd20eae…

MALICIOUS

PDF

43.7 KB Created: 2020-11-04 04:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2f6a05127371370c1032d3525b71f7e4 SHA-1: de37632e1bc38953716db8ecfccc1de6507c72fa SHA-256: 882d937d5cd20eaee01b9221112548e09204d42b9104ad33e289db4a4adef74b
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.ru/123?keyword=girlfriends+guide+to+divorce+finale+recap In PDF document text
    • https://xamonato.weebly.com/uploads/1/3/2/8/132814301/1543646.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/913a3.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/959063.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/6590595.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/pazifetanegapu/refukemitaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/post_great_grains.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02417b4-f2f1-498e-a0e6-2bc72e286933/dsu_testing_center_dover_delaware.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/zufijegunaserivuridagabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/715cb127-efc0-4402-b406-963ec70dd975/bnha_heroes_rising_full_movie_dub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76ca3b6-3b9a-4901-b6ca-84a6073a9bc2/sipafo.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/bagatisekajemiwefewok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b33b526-17c1-4ab0-a158-059c4f9c473e/christmas_carol_songbook.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/anestesia_general_medicamentos.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_off00005e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E10 5296 bytes
SHA-256: 2bb3aaea616b0de3d52fb9c2dcf644a59c21b7da47bfc1524b06d125cc940585
font_01_sfnt_off0000702f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702F 10420 bytes
SHA-256: 2cedc682a75dc86f7fb8a502e4e0cf564ad4f1d05f29386b0823437a62453bd1
font_02_sfnt_off000093d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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