Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbb3cea4761e25b…

MALICIOUS

PDF

69.7 KB Created: 2020-10-27 20:35:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb310f380ae19ca1c08951418005017e SHA-1: bf49106248f98abcdef283256d4f94b57543b348 SHA-256: ebbb3cea4761e25bf625479efb58e45e5cd170ef6105f9dd57db227f5143fbe1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are also listed in the extracted URLs, suggesting a coordinated effort to direct users to potentially harmful content.

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://gettraff.ru/123?keyword=domain+specific+vocabulary+demands+of+academic+language
    • https://kawewadibuporak.weebly.com/uploads/1/3/4/3/134371142/nivalot.pdf
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/mefibinom.pdf
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/lukebarobeguma.pdf
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/rorebidesaw.pdf
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/7528e50f194.pdf
    • https://tenaxujapem.weebly.com/uploads/1/3/4/3/134341928/39397a26ad764c.pdf
    • https://mematuseb.weebly.com/uploads/1/3/4/5/134516495/dijobovuxulu-bededisalavate-daxedamuduzi.pdf
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/5711090.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdf
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/bisuxijikigovu-pakaf-joromifura.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/duzexefemosaxe/vuvavujefazev.pdf
    • https://s3.amazonaws.com/zirojopemup/30078060853.pdf
    • https://s3.amazonaws.com/salosibejodod/93425921856.pdf
    • https://s3.amazonaws.com/gizonukorad/tegegobagus.pdf
    • https://cdn.shopify.com/s/files/1/0481/5378/8569/files/armanen_runes.pdf
    • https://cdn.shopify.com/s/files/1/0432/3360/7842/files/wyvern_vs_dragon_game_of_thrones.pdf
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/scepter_cell_counter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/riletota.pdf
    • https://cdn.shopify.com/s/files/1/0497/3730/2170/files/mewefudevage.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/faferijofuxinoraviveka.pdf
    • https://cdn.shopify.com/s/files/1/0481/4349/9413/files/diatomaceous_earth_home_depot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c308.bin
8ee7487b542291bd187105a206498758a5a4677c1cce58070d4878e45af8e1f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC308 5576 bytes
font_01_sfnt_off0000d5e5.bin
18d939e2891adaa8e4785b31ab99a422d52c771948228bc9594878812ae11c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E5 10888 bytes
font_02_sfnt_off0000fa96.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA96 4324 bytes

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