Malicious PDF — malware analysis report

Static analysis result for SHA-256 cebb70a14ad7613e…

MALICIOUS

PDF

57.2 KB Created: 2020-10-06 12:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 19d8fee7c8406604bb7bf2ca7fc72cac SHA-1: 6227561d51a009e798b0da61afd7001d7c6c40fd SHA-256: cebb70a14ad7613e56254f666f4a6b57ac78b5ebdde6478fcbe4c544f7a8b6ee
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious due to its extensive use of embedded links pointing to known malicious redirector infrastructure and link farms hosted on disposable domains. The document body contains obfuscated text and URLs, suggesting an attempt to manipulate search engine results or redirect users to malicious content. No scripts were extracted, but the presence of numerous external links indicates a likely distribution or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=tfboys+manual+of+youth+lyrics In PDF document text
    • http://megorubu.beatricekwok.com/uploads/1/3/2/6/132695636/7912964.pdfIn PDF document text
    • http://pivif.dmvconartists.com/uploads/1/3/1/0/131071057/fuverubotoruwij.pdfIn PDF document text
    • http://xosuse.stevemoorefoundation.org/uploads/1/3/1/3/131379833/vuzodebavebuzix-tubijafedizerim.pdfIn PDF document text
    • http://keluvadax.everyhealthything.com/uploads/1/3/1/6/131637503/4153076.pdfIn PDF document text
    • http://files.justritarealtalk.com/uploads/1/3/2/6/132695874/cbf76b5d.pdfIn PDF document text
    • http://vekolo.1000menempowermentgroup.com/uploads/1/3/1/8/131856543/bowupirejiwulalalil.pdfIn PDF document text
    • http://files.girlingandfraser.com/uploads/1/3/1/0/131070506/xazuxamusuruxa.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/29512226522.pdfIn PDF document text
    • https://site-1039209.mozfiles.com/files/1039209/pejosimufeku.pdfIn PDF document text
    • https://site-1036941.mozfiles.com/files/1036941/didufuxasori.pdfIn PDF document text
    • https://site-1043569.mozfiles.com/files/1043569/turigujotapekobut.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://uploads.strikinglycdn.com/files/5cb41a50-b8c0-467a-81ba-40c63da4aa40/70558040956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66212ecd-55d7-4d24-9652-1daff7a1a4b3/munud.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBA 13368 bytes
SHA-256: 08dd2dfa6554f7225984338baa81388ec599343601887b5fe52829b8ac7a78f6
font_01_sfnt_off000088c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C9 5076 bytes
SHA-256: 25d4d9240c2ee938430a20945be785b83fec42e9a0092245b67f215532fdadf1
font_02_sfnt_off000099d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D5 16488 bytes
SHA-256: 864236d4541704e321f67035bc43b8da5e31ed2fc44001d8cff613c28a485c6e
font_03_sfnt_off0000c9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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