Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4562cc9c346120…

MALICIOUS

PDF

51.3 KB Created: 2020-10-25 17:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3cb911ec171d086e4269088777d8ecbd SHA-1: dae4c198229d8281c6842f96fe8172030ef94317 SHA-256: 6e4562cc9c3461207573fbffeea4ae2951702e5020dee1743d473362e2ffdc2b
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://cctraff.ru/strik?keyword=c+form+frro+bangalore', is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, suggesting an attempt to distribute traffic to various external resources. The presence of urgency language further supports a malicious intent to prompt user interaction with the embedded links.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cctraff.ru/strik?keyword=c+form+frro+bangalore In PDF document text
    • https://guzuzixud.weebly.com/uploads/1/3/4/3/134357052/8750507.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/e2e63edb37ac.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/5494272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f956df73380e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_5f94a0fde0e38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f8d29c7359dd.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/663b0cd7-d587-4d3f-b3ef-fadc5fcce25f/mogijojexebiwodoxot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611fa60f-7bb3-4b9b-8196-f33cf9ef9eec/38713450800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a9545e-f7f7-4e0f-b1f0-0e8704638125/kepixine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb6207a-4517-45ce-8dfc-f9521b508242/levoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff1cd84-fa16-454e-bdae-a6f6bfb3d6b6/likezutubobalixizafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30534d2d-cb82-4dae-9e23-0374bf458bbc/9405948714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5715/0632/files/fallout_4_goty_strategy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0700/2784/files/convert_to_jpg_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3247/6317/files/tensiometro_manual_riester_especificaciones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3457/5516/files/lugisufavugulila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/shantaram_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2340/8545/files/vawijezefemusexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3943/9032/files/mitsubishi_montero_2020_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7281/8845/files/jump_rope_dudes_swole_samurai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0033/0903/files/gixerefuwadirama.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A7 4956 bytes
SHA-256: c5a472479e99adfa517f986db97a991873940f95ec3df43d63d3e744cc9a792c
font_01_sfnt_off0000856f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856F 10880 bytes
SHA-256: c60e25e1475f6295a9a051941ff289faadbab24469d65efc6e14f00704fd89b3
font_02_sfnt_off0000aaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAAC 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8