Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3103488917cedcc…

MALICIOUS

PDF

47.5 KB Created: 2020-10-17 17:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 77a442c66c4b00e43158f7708cb8cadd SHA-1: fa9d3bd6cf43d771a15d5730d6b120371e527648 SHA-256: f3103488917cedcc7e33c4614c49b02481e3c0b8a4c1be7c5d5c4627380a3c4a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://gettraff.ru/123?keyword=mendelian+genetics+questions+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to redirect users to malicious content. The presence of numerous links, including one to a known malicious domain, strongly indicates a phishing or malicious redirection attempt.

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=mendelian+genetics+questions+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f8a5a234739a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f882d1c71ced.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/3999753.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/4665135.pdfIn PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/6536950.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/mozonabipos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7390/4545/files/boo_madea_halloween_full_movie_free_online_putlockers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0675/4470/files/solving_proportions_worksheet_geometry_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/36683546137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/57284169569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8444/0261/files/pipurawepogekotevugowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8979/8333/files/91170637165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5711/4019/files/transparent_mobile_phone_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85580809-4c99-4cfe-923e-d655a1655585/41677395580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff2b802-a1fe-49db-82c6-24a9f538cf0c/bubezamilafuxibuzojom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590ec601-39c7-4f4d-9281-a41ded209049/mixekene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3905f503-2669-4e04-8c88-fb99d8c7e02c/atlas_de_anatomia_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b22c4e-8061-4c12-bbaa-7c80a5975a52/sawobew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1861/6473/files/accion_y_reaccion_thalia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0312/4375/files/trainz_sim_2012_content_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6573/2003/files/pebelozo.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_off00007b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B55 5356 bytes
SHA-256: 5345b361e61614cd218d440c121dcc1757008748f48dec1099bdcd175a981211
font_01_sfnt_off00008da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA4 10168 bytes
SHA-256: 67cc7ae6e21ced591fcc3dd6b959454a9ed15c07aaab07876693e9ece577149c

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