Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44cbd2bb7c2c6ef…

MALICIOUS

PDF

54.5 KB Created: 2020-10-31 13:02:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b0b1c5cd9ed39707be6da7f4a1483af8 SHA-1: d7af7bfe4d777e91ab4b8390a8aa206be0a3ec10 SHA-256: d44cbd2bb7c2c6efa60d8b969a9fb2fcff5113970f528e0b98e4f6115609eff8
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure for a fake 'icloud unlock service' and embeds numerous links, many of which point to redirector infrastructure known for hosting phishing pages. The primary malicious URL identified is https://gettraff.ru/aws?keyword=official+icloud+unlock+service+free, which is part of a link farm designed to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the phishing and redirection attack pattern.

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/2210359.pdf.
  • 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=official+icloud+unlock+service+free In PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/2210359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393889/normal_5f9cf9fab2dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f8dd0eb6715a.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/fuputes-kesiwovela-kirifeke.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.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/1/0433/8050/6773/files/94827232238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023c2540-d174-4ebf-84c5-748a13dec8fa/51798730525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/610a13d5-178d-4926-9f82-d59a9fec6bf5/21187586442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a7a3b8-6e75-4073-9af2-9345ef7630f1/45497412696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16f68e9-725b-4668-a624-f0aa604afe6a/sumove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee62c462-2380-48c8-a375-0423d6c161de/dj_snake_let_me_love_you_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3190/8511/files/criatividade_e_inovao.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F7 4968 bytes
SHA-256: 8b4d7604682efa0e9cc60982b5b6bca949b56f2e85b9c70147debbafec5bc173
font_01_sfnt_off00007add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADD 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000836a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836A 11420 bytes
SHA-256: c473c0b04caae0ea48d4a808a19d5aa3a7a77e2223dd94339fceb44c5b097bbf
font_03_sfnt_off0000a92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA92A 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_04_sfnt_off0000be59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE59 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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