Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1c607aca7ab6a9…

MALICIOUS

PDF

50.4 KB Created: 2020-08-22 08:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0edc87811303584df3f4e8f127640933 SHA-1: 6b70be6936c623e7564f75a36805150c9193f909 SHA-256: ce1c607aca7ab6a9121a529f0bc36e0c16e6225f5b55cfdbe692d15f6495ca83
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.ru/pify?keyword=black+and+white+photography+tutorial+pdf In PDF document text
    • http://vapidaw.nawalphotography.com/uploads/1/3/1/3/131383726/5265730.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/1/0427/5961/8716/files/bsc_1st_year_maths_notes_solved_exercises_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/gometewadepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/52346956606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5077/8269/files/rufeparilabitelarot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/yerf_dog_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/45278210562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5190/0310/files/53071671181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/famedilujokesaxitez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/tovolilunusixifegif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/cambiar_de_a_wordl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4117/5190/files/gobuwezodewuvibibesajigo.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_off00008670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8670 5548 bytes
SHA-256: 71455b697f1b16bde39bfc876980626669cd161c972fcf912ea8628fb95f0b61
font_01_sfnt_off00009957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9957 10448 bytes
SHA-256: 620329eaeb7262f599591979220d053d351fdecd8818f550d27030b74c017a06