Malicious PDF — malware analysis report

Static analysis result for SHA-256 727cd31fec863b6d…

MALICIOUS

PDF

67.0 KB Created: 2020-10-14 20:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b04b46601365fa5cf5aa5a64d3b4052f SHA-1: 6a87ce546f94c1a7d1dad647cbfdbaa176fa817c SHA-256: 727cd31fec863b6d905ecb139e9dc3447f0713958d686710f635061cd0dbc2c4
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=big+lots+electric+fireplace+instructions In PDF document text
    • https://site-1037885.mozfiles.com/files/1037885/20909368776.pdfIn PDF document text
    • https://site-1040141.mozfiles.com/files/1040141/56097669480.pdfIn PDF document text
    • https://site-1039707.mozfiles.com/files/1039707/5181538569.pdfIn PDF document text
    • https://site-1043519.mozfiles.com/files/1043519/1253244661.pdfIn PDF document text
    • https://site-1039290.mozfiles.com/files/1039290/dawodapisuditepawazoguna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f87001f7627a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f87135fb91ad.pdfIn PDF document text
    • https://site-1039393.mozfiles.com/files/1039393/92058021438.pdfIn PDF document text
    • https://site-1040669.mozfiles.com/files/1040669/lojanixeliwapida.pdfIn PDF document text
    • https://site-1039290.mozfiles.com/files/1039290/ligumazugozuvaderuvoji.pdfIn PDF document text
    • https://site-1039295.mozfiles.com/files/1039295/39786041565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f86f6ba867d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f871af10f62a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/974702d6-21bb-477d-af00-94009e1c9bf5/figotob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e73b01d4-4e3d-4ad8-b5c4-b198223ed4b6/negixumeronaninifogokux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9568797-c7a4-483a-8b57-bde4cbeba48c/58298507653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34071aa6-ce74-4167-88b2-5c8272e9583a/gupidepibarenepefefakanud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf2d35f-4c7c-413c-8148-2d677215f70f/dofadorumuwafivivoniwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6386644e-d373-4dbd-9a29-0f7299209836/siduduzop.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AA 5232 bytes
SHA-256: 8a0b022763d53a82c0118190b2d242e37b0b279aaa0ad6f74a06e4d3ee2bbef4
font_01_sfnt_off0000c48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48E 10792 bytes
SHA-256: 31bad930b91da15372101603cbb80fc7cc581bb0e3dafd1b9046e8cb40be9022
font_02_sfnt_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca

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