Malicious PDF — malware analysis report

Static analysis result for SHA-256 1feb4f788848fdd4…

MALICIOUS

PDF

40.6 KB Created: 2020-08-10 02:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f0d31e2fe0b6fea625b627fdc15ee920 SHA-1: dc90f2efcec29304f0c251232625fb63b2a2013c SHA-256: 1feb4f788848fdd4beee4f4cdf790eacd7e85193242a9a4110075ca47a436d11
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.com/pify?keyword=types+of+assets+and+liabilities+pdf In PDF document text
    • http://files.essexcountyhatchery.com/uploads/1/3/1/3/131379111/mexebijepogefun_nuzotizizanawom_virid.pdfIn PDF document text
    • http://files.proficiencyfirst.com/uploads/1/3/0/7/130738708/3878826.pdfIn PDF document text
    • http://files.yorkieskisses.com/uploads/1/3/0/9/130969461/sepakogitopo.pdfIn PDF document text
    • http://files.in-touch.org/uploads/1/3/0/7/130739155/bivago-pebojutajo.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/1/0430/8225/2442/files/86190202961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/44018388556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/20353364211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8726/3899/files/38099669691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/rixutob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/dowanadepezuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/novupuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/firoparibowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0600/9242/files/diwodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/31216740242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/89151451179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/how_to_stream_on_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/nasa_brand_guidelines.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_off000060d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 5132 bytes
SHA-256: 73228992ff134ee4c8fa501ab2342139a6f2d417c285dbdf7c91eb55184c7c87
font_01_sfnt_off00007268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7268 10180 bytes
SHA-256: 8fb0eaa2ff42a6e443a902cf5fd52d38970a38c75fa73eb981bd3f33ca8434b9

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