Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8f6f66f7db80e7…

MALICIOUS

PDF

40.8 KB Created: 2020-11-09 09:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 92dc317b05224314a541747b75b4f7bb SHA-1: 116c8a33176012fb004857f4e60d63fee94d0134 SHA-256: 6b8f6f66f7db80e7fe4ae44c574d5bc232246ea982eb094353f3a29ef607eed2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary malicious URL identified is 'https://traffine.ru/123?keyword=phase+changes+worksheet+answers', and another significant link is 'https://rojomitalo.weebly.com/uploads/1/3/4/4/134485393/2352636.pdf'. The document body is heavily obfuscated but contains these URLs, suggesting an attempt to redirect users to potentially malicious or misleading content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/123?keyword=phase+changes+worksheet+answers PDF link annotation
    • https://rojomitalo.weebly.com/uploads/1/3/4/4/134485393/2352636.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/9384590.pdfIn PDF document text
    • https://variwigegepug.weebly.com/uploads/1/3/4/3/134348450/9081635.pdfIn PDF document text
    • https://vujofuda.weebly.com/uploads/1/3/4/3/134375628/jidetiradamipat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a94b096-314a-49d8-b3a6-2ffb4d606aa4/diethylpropion_brand_name.pdfIn PDF document text
    • https://saxixukosob.files.wordpress.com/2020/11/ikea_kitchen_doors_faktum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3204785-4bae-4bd1-9a45-0cafb1592b8b/spider_pig_lyrics_in_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2756408a-8450-4e77-a38f-668c241df85f/xazonajixexatezatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b0ec5c-164e-4544-a905-7ae5cf8d4a02/meaning_of_ickle_me_pickle_me_tickle_me_too.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f485c27-e73d-40a6-81b8-77cb580645b3/gta_liberty_city_stories_cheats_ps_vita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a24cffd-a5d3-4e8f-b49f-8f1d415f8ce5/earth_science_chapter_5_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/50333152798.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_off00006098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6098 5188 bytes
SHA-256: 4996829b31d691a5247f4923c1c1b5895ced855cc4319717a6df586b16e4c185
font_01_sfnt_off00007249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7249 10508 bytes
SHA-256: 15bff3370b0d1a2a12fc7af096ea7a77f105ea63761c214b6c70db7af91e2a14

Open this report in the interactive analyzer, or submit your own file for analysis.