Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c08e19a23713c04…

MALICIOUS

PDF

130.6 KB Created: 2020-10-18 14:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8f8a193aeee7c551f5d5caceb324f560 SHA-1: 93f48e71d32603a6122ca26b74e539d79137cd6b SHA-256: 4c08e19a23713c0434ddff9bd63e6af9f869e77897df96c2ccbcfd6483cb73cb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/123?keyword=africa+continent+political+map+pdf. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous external links, many pointing to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • 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.me/123?keyword=africa+continent+political+map+pdf In PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/b3f38b669d.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/9905f39dca08.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1441493.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/1867610.pdfIn PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/wizaxiwunugeg.pdfIn PDF document text
    • https://misopiwulasi.weebly.com/uploads/1/3/1/8/131856666/pawofi_mituraga_vapuraledog_juraz.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/2824351.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/1/0268/8624/2473/files/39802423790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2414/6855/files/97830019242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/pubg_mobile_lite_mod_apk_unlimited_bc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/drunken_botanist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7527/2349/files/screen_porch_roof_ideas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9765/2376/files/68576104092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/goodman_y_gilman_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/sajiripotewagowis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aef58fb-431a-4fab-9843-70b6cd908698/komip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9fddb6c-7e9a-4e93-9ed7-649ea45b44b2/12000710572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9058652-4199-41a8-ab00-18edbb719f3a/17173715149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bca8f6-d061-4d5f-80d0-bcaf8697f2d4/nuwonekisuneliwikiset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1644096-8745-4dce-884a-0ba2f5c95215/gepukunowinugok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12f9409-ae44-4913-b8c8-806e77001e2c/kisofuzojimexukadituwopus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe8b0e6-87dd-485a-95a9-e5600b603628/malananakusupodagep.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_off0001b64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B64C 4900 bytes
SHA-256: abc1b69a5a72c7737a01fccab22fbdd9dfc6cb316c99fcea4dfa7eeeb9b094a5
font_01_sfnt_off0001c6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6CB 11856 bytes
SHA-256: d59e539b80a84c04fa34ed72c439e368409e495b68c4e8e29cd1ae8baf6a5757
font_02_sfnt_off0001ee68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE68 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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