Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab0e26e6cb679b6…

MALICIOUS

PDF

54.6 KB Created: 2020-10-28 06:34:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f4b2f0cd714f3243f8d022bbe06eeb6e SHA-1: 4577c448cf4d75b17fe31a571429473320dd4e25 SHA-256: dab0e26e6cb679b6456322a4a0a5d567e350f25f62ca859b4310048c2cea83be
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirectors and SEO link farms, designed to obscure the ultimate destination. The primary redirector URL, 'https://ttraff.com/123?keyword=political+science+textbook+pdf+class+10', suggests a lure for free content. The ML classifier strongly indicates maliciousness, and the presence of multiple external PDF links points towards a link farm or phishing attempt.

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.com/123?keyword=political+science+textbook+pdf+class+10 In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/7292536.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/1e30a2b93.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/1864c74dd3.pdfIn PDF document text
    • https://nelovemisero.weebly.com/uploads/1/3/4/3/134347795/2823861.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://s3.amazonaws.com/gujutavevive/bhagavatam_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/teks_pembukaan_uud_1945_untuk_upacara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/95298950789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0542/5856/files/after_3_romana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3096/1054/files/napezasoxupejugibikelil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0081/0653/files/mowubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0762/5381/files/ejercicios_reglas_de_acentuacin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9052/3813/files/kumeliwabegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5347/9614/files/pagalajemumowibadav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9359/7601/files/circle_tangent_theorems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a42d336f-0468-415a-8684-dcfaa3f0070d/12705692942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389309c9-ca48-417b-9f18-f919a978673a/tojuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb1c04f-bf01-4e85-b7ce-a2518be54d89/muzipuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c0ef86-3e33-4727-97ed-b6d283dc91ec/zedukekajelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834994a4-dc3a-457f-8a8a-d2f0908f7338/bipanisodoxesol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69dd5418-2edf-4347-8225-96391c038393/teduvo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 5520 bytes
SHA-256: bf6751e43378b83e171bf6f23e5dc87f27e1bfa0680fd6e463661a1f013bda2d
font_01_sfnt_off00008043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8043 10880 bytes
SHA-256: 9eda389d89c362f1b28bf1ac0c2ee73e43a6506dc04de5e1becdf53b2de884ea
font_02_sfnt_off0000a548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA548 16488 bytes
SHA-256: 82671152c878833e3f9abfdac7c8bff42fcc51026bb08f296acc876f37e34aae
font_03_sfnt_off0000bb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB99 4576 bytes
SHA-256: 3180a7219643efa80cc57af79885d8b0092ee1c6c51dffbde695573d7c9196eb

Open this report in the interactive analyzer, or submit your own file for analysis.