Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d62b7953ebcf911…

MALICIOUS

PDF

44.6 KB Created: 2020-10-09 00:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f3d43a71bdaf7b0af88e2f1b95e29ba0 SHA-1: ddae41f919a57d90d476ec40b9012883d47da459 SHA-256: 8d62b7953ebcf91106c47cd94f468047dc744d7cb7af1426885661416f524cfc
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.link/pify?keyword=body+systems+graphic+organizer+answers+key In PDF document text
    • http://jubukexu.gracebecker.org/uploads/1/3/2/6/132683138/3248077.pdfIn PDF document text
    • http://fopom.bridgeportcf.org/uploads/1/3/1/8/131871787/1802088.pdfIn PDF document text
    • http://files.edsinstructionaltechnology.com/uploads/1/3/2/7/132712129/tomenez.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://cdn.shopify.com/s/files/1/0434/1668/2663/files/kinadamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6767/5302/files/18567510636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/tozesix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5323/9457/files/jutebem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/the_iliad_study_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127a4396-1dd3-4dbc-bf20-7ec856263b25/lexupeteni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d2eb5d-102e-419d-9b7d-ac80321eda0b/zisatosozusupojanebim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17753ae-5e8c-4670-9c7f-222fd83690c2/70955722247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2be97c-e150-4617-9372-5062de939f3c/debijifonirigonuvabav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5603/7017/files/paul_frank_bike_grips.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6457/3593/files/minecraft_games_unblocked_66.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_off00006121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 5600 bytes
SHA-256: bda2e852c9b0b8ad3340b55545eb2b835ab4052daeae40c82f8e353d911427f8
font_01_sfnt_off00007422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7422 10348 bytes
SHA-256: bc5c4ec1b2b86a9740ce5dcc2052bc51f999def88f31eae80b40954b13327a6a
font_02_sfnt_off00009771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9771 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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