Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e001c73b5bc9c99…

MALICIOUS

PDF

63.7 KB Created: 2020-10-16 07:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 67605920041e7d0996154640023727b5 SHA-1: 5b920ccbac0cffc38ba55969fa3dd1e6c06838f1 SHA-256: 0e001c73b5bc9c996094d4dcac84e5298d4ac6e5c2f46305fcf915afb440f9b1
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=upsc+agriculture+optional+books+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f874445c243b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8757283b278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f88fa5d96097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8711bb7b6a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f876689865ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f87579aa1c69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f877814cf642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f887d35e1068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f8866ed2be6d.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/1/0497/1252/9587/files/shuttle_from_sarasota_to_tampa_airport.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5207/5681/files/53765312331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3955/5225/files/maxanorajeviragagekodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/71290489194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9941/6485/files/63982335392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0606/6325/files/best_movie_2020_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3377/8597/files/zowixolewudazedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9964/4064/files/11994010601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9723/6650/files/79824837392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1e3751-4ba0-42c7-8687-0112c45756a6/nelopijofajidet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55713543-63b3-477f-8bb3-d9beead1f02f/1080295323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99be12ab-5c01-4949-b7a3-043d198363f5/69723864073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293e91fc-5f66-48d5-999c-453dee2301ee/87047589171.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_off0000b0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F2 5516 bytes
SHA-256: 758424bf1a56ec73b238bd72031701f3447a78bb627ec1331e044356b3e22ec3
font_01_sfnt_off0000c3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BB 14548 bytes
SHA-256: 8c8875c81b2ea12ed68da5d76d7b6d01e11c7b9706d5c9b53284736abd6e46de