Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ed763bc57341cf…

MALICIOUS

PDF

82.7 KB Created: 2020-10-25 14:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 198b6480168f325cc67e2c909449df58 SHA-1: 9ccd545448e399a0d05cfa3c31039f7a1f3285f8 SHA-256: 87ed763bc57341cf86bae74bf27fbf539ac01d669ffd18de47685258ecf90863
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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 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=i.mx6+quad+reference+manual In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/199877.pdfIn PDF document text
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/lafiloxidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd7a477-d515-4f7b-a94c-9c7a6a67498e/30329778762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a58a50-fe70-4191-ad05-308c0334608d/elementos_esenciales_de_la_organizacion_administrativa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0b2760-da6e-4315-88fb-224277fac89d/ledamuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5949fc-e2fb-4d47-8588-84647be753f5/87200451784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5875/7277/files/xovusegutikomidozola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5369/8202/files/rotasi_file_permanen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0449/4500/files/rateku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3655/files/advice_and_advise_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d17184-b418-41d0-8619-ed0b88f94f27/70855251325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae7089f5-3fc6-4c4f-909e-7755f383bdce/pawamewipufajogazow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d8bc88-46e1-44de-916b-9a4fed9b7ac9/93515911786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71dbbc0-e002-42a6-841f-94f1dd7eb69c/38917598371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683de855-0169-46ca-8266-2553ac6f07aa/mamulobika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2235e40f-2368-4030-92c4-fbf3c07ac583/filegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09127d07-ff14-4202-8942-961a916d5b78/7588777050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3754/4607/files/xixek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6844/3810/files/61005903224.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB4 6400 bytes
SHA-256: d432d87128c4865c81531e9fc4f215ba86e91298b81c501e1a9de0f5f93e0c75
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 5304 bytes
SHA-256: 938d1c6a924b1ca9eda9df56e23d75660414e730c70bb40e2ae08b4f224f8f97
font_02_sfnt_off000104c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 13688 bytes
SHA-256: 767b41232761cd2e1618a85e948ec7aa004c235f50d128824092a7474e8c818a
font_03_sfnt_off00013193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13193 2324 bytes
SHA-256: 0398a69b93eb684cee4ab0d9f01ec3e84c35de1d62e4808f32646fff90b581e3

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