Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ffd54b2fb75c69…

MALICIOUS

PDF

40.8 KB Created: 2020-10-10 20:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 3c306fc2cb7e34a96aed8618bd663d38 SHA-1: adee245829625fc52f52b1aad694429adc2560e2 SHA-256: b5ffd54b2fb75c69f084a2a43b1912941fca0f10eb72010f1c3f3ea9ff13f6dd
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://ggtraff.ru/pify?keyword=archetypes+in+lord+of+the+flies In PDF document text
    • http://files.ruralnevadanews.com/uploads/1/3/1/6/131606035/kijutiselir.pdfIn PDF document text
    • http://files.projetmandrillus.com/uploads/1/3/1/1/131164479/9324702.pdfIn PDF document text
    • http://files.numeroo.com.au/uploads/1/3/2/6/132682806/zapinuvol.pdfIn PDF document text
    • http://files.mountainlightmusicfestival.com/uploads/1/3/1/4/131438058/tipapol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5ef5a9c8-0814-435d-9fa5-25ba91470de4/gafurizatadelamebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5568/files/48604333296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/9907/7016/files/honda_harmony_1011_parts_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/53226015726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/romeo_and_juliet_dire_straits_easy_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0912/4763/files/show_n_tell_phono_viewer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/80074702678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6560/1959/files/nobike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5802/6901/files/65830381967.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55A5 4912 bytes
SHA-256: 85b7b5c11e10d1b508566c47caf00d7d9c1b09c22d202304a50b5741fa0f92c7
font_01_sfnt_off00006650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6650 9924 bytes
SHA-256: e7f7a0bc645f2b550c16fa4a4c864fe3ca5585c2bd0fc568b6d0a6f5fb8799d8
font_02_sfnt_off0000883f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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