Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d07faa4fa4c20d…

MALICIOUS

PDF

44.6 KB Created: 2020-10-17 17:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 30fdaa57fc0954ef7f2fdde086d31783 SHA-1: 7e40bed4c455b77ee4c574d1a8b11b280b02cc16 SHA-256: 85d07faa4fa4c20dd36c506dbfaa99581a75b9fc7e977605e816ab3cd00cdbee
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://gettraff.ru/123?keyword=spotlight+presentation+remote+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f878e272ad0f.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/36ce75ac.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.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/e78b6257-c321-4c1a-8f28-c984b15109b8/1261891722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b24af6-253f-4b2a-a107-e20218b34826/renudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1617394-9416-46f1-b2da-af354014f0cf/40929067671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acfe216a-2ff4-44eb-b87a-7ccd099d8ef6/73866015244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e504e491-7510-4424-8382-18fa17868af0/7719786788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f07bc5c-dce9-49ea-a83f-bf941398128e/nutarubex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c54e42-be4a-4873-b6a2-90ad2c55f0c6/85723599549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfbd4977-c4c6-4cd8-a18b-45c5c8ae2afd/8841020854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4888/6684/files/68015157764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6504/7716/files/65550733030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3522/0904/files/mibalaxudelidopuzekuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2352/2216/files/washington_state_biology_eoc_study_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 5332 bytes
SHA-256: 5de8975f07aab0da0c0c8047e7080480441691f65091dcaea5df17de21ca0d5f
font_01_sfnt_off000073ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FF 10128 bytes
SHA-256: 43fc5579dedc5415c04a40bf02eb58d4fbcb14ed035ccb1114da5ab40399eb82
font_02_sfnt_off000096b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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