Malicious PDF — malware analysis report

Static analysis result for SHA-256 69327c92b3cccf5c…

MALICIOUS

PDF

36.7 KB Created: 2020-09-21 13:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d4d3104e91a7d6668381140655f79d7a SHA-1: 37ccb9cb5966702cfa857136e397d07d17089ac5 SHA-256: 69327c92b3cccf5c59626244f4f00ab29346c596c404faba3286e8a99981af69
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.club/wix?keyword=descargar+music+maniac+apk In PDF document text
    • http://files.stjohn23rdadult.org/uploads/1/3/0/8/130813818/muxigori.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/1/0428/5346/6271/files/56419322832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/understanding_pharmaceutical_quality_by_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6604/3801/files/breville_die_cast_model_800esxl_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4841/9747/files/49991088989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/bajopusiwitewid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5573/4167/files/ammonium_formate_ph_range.pdfIn PDF document text
    • https://b81289ec-a5ba-4e30-9891-fc7775998a0f.filesusr.com/ugd/3bcfef_df2570731fe6468cbb8636fb15621527.pdf?index=trueIn PDF document text
    • https://caaef72a-5747-4efc-b0c9-e5c77d40f5ea.filesusr.com/ugd/9058e5_8caf9693b5e9491fb9546cae5a4e6e0f.pdf?index=trueIn PDF document text
    • https://f7511a95-ee0b-408a-b4a8-7ccdeeb6b616.filesusr.com/ugd/ea5d7b_b439c8ce65304fd1bc585d0ee8b33ed1.pdf?index=trueIn PDF document text
    • https://00077cda-f5c6-470b-adbc-8e1e178acfca.filesusr.com/ugd/61567a_ba13a5cf8b7e4b13907e083c2136a738.pdf?index=trueIn PDF document text
    • https://ae0b9232-a00a-478f-aabf-0efa57f913f4.filesusr.com/ugd/2d797c_be115ebd94424b1f8e64af0cf1343415.pdf?index=trueIn 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_off00004bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BDD 5284 bytes
SHA-256: 17784fe411b4afc94ec05bc66793cdfe63f026fcdc70ccdd15974d9009c8577f
font_01_sfnt_off00005dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCF 12796 bytes
SHA-256: 1f2e028906ad4ad3ad7931ae6c7114817cfbab4bcce69fa9a673560d4971d2f8

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