Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7d4534c605e131…

MALICIOUS

PDF

64.7 KB Created: 2020-10-25 13:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a1df880db92267f4ad28e2a5e1cdc372 SHA-1: bd46750811cd78b8a41e09395aabd7ade5772748 SHA-256: 0d7d4534c605e1314cfafad60f2501b247895eaeb25b06cd0c3429746045b73a
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.cc/pify?keyword=basic+of+inorganic+chemistry+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f8ff97e53146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f89fd31e7879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f9108b550f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f905e28928e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f88c33f6ded3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f8b16c05533b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/chuyn_sang_jpg_bng_foxit_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/62246647155.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/chelating_agents_and_metal_chelates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0472/4901/files/nitejurexoxuruxaremeladi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82cd9ec4-1308-4b81-b462-832fb4bd23f4/lojezibanizakemix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7806919-d3b1-412a-9864-3977135eb3c0/ark_breeding_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e362c9a-b086-4298-be96-8871893cd9f8/pregnancy_symptoms_after_implanon_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34addbe8-5f45-406d-9b7b-ca498fb422db/93447629563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0564aeb4-65b2-4ead-a9d4-929b907f741e/volule.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/cereal_crops.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/73340951774.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_off0000b174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB174 5688 bytes
SHA-256: 7c873febaad235ac27be8ba2315407579f508e36d8e8414dc3c95db29776696a
font_01_sfnt_off0000c492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC492 15764 bytes
SHA-256: 597a085baa3fec2850c8fad46acc31f09f9901fb0e5d3277706ccc0d26ff8d99

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