Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd9d7356a8673e7…

MALICIOUS

PDF

57.1 KB Created: 2020-11-03 21:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 850aaaae413c003559951d7f549e0310 SHA-1: ae029cbb1048e3585fa79c1bdc569ee182690250 SHA-256: bdd9d7356a8673e7418b36b1326ae29d4ce771a4d430f75ec2d5c17c3bd5768d
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/aws?keyword=pop+slots+free+coins+game+hunters In PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/vuwuzozoxodav-gizoru-lexipapakofobal.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/tetakidivikev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5f8e6a632fb6a.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/c0f7167e-2772-4a33-a6f4-c23330fc270f/13183755221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f620e6f7-0876-48b9-87c0-0b206387b1b1/rogamegeserori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3398/8767/files/1941011812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb99fde3-fa84-4431-af75-fbc8868b7528/1850830392.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/21151624227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/4913/7306/files/adventure_time_encyclopedia.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/60100814898.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/30596797941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ca77a3-159d-490b-9654-ce797ac91bac/saxon_math_7_6_test_answers.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a8ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA8EE 19760 bytes
SHA-256: b63e06cb26eb7c6a058aeb2c377f367068c214f634aaa5fa678f52b1356ba541
font_00_sfnt_off0000728b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728B 5312 bytes
SHA-256: 0dfc28a7313f9da5af3ee1134a3351783405886dd02b1c475c97fe0e592dd827
font_01_sfnt_off00008469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8469 10688 bytes
SHA-256: bc38d21cccaed41a1c88cc1ceb565a91fa4bfdd7a5a51487348c33480fd84524
font_03_sfnt_off0000c8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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