Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd4c77e3c62c32b…

MALICIOUS

PDF

49.6 KB Created: 2020-09-30 08:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5c3f8a9b9bcdf566770c2aa19404862b SHA-1: 16d7e5cb4f74a040c43ef9daa11a1673fef130d2 SHA-256: 2fd4c77e3c62c32b37677aeeb4a29bd0a8ccce9b63561ab0cddd132116377f41
154 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ggtraff.ru/strik?keyword=agricultural+economics+pdf+books+download+in+hindi. This technique is often used to distribute malware or lead users to phishing sites. The ML classifier strongly supports the malicious nature of this PDF.

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://ggtraff.ru/strik?keyword=agricultural+economics+pdf+books+download+in+hindi In PDF document text
    • https://site-1037882.mozfiles.com/files/1037882/40343047450.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/61213757705.pdfIn PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/penusudagezoralom.pdfIn PDF document text
    • https://site-1037205.mozfiles.com/files/1037205/kegopurinetizalef.pdfIn PDF document text
    • http://biwenebuk.genesislactation.com/uploads/1/3/2/8/132816117/gofolijo-zaxejegigi.pdfIn PDF document text
    • http://rozufe.artfullyyours95.com/uploads/1/3/0/8/130814339/1543843.pdfIn PDF document text
    • http://files.adansilveriomurillo.com/uploads/1/3/0/7/130739850/2372283.pdfIn PDF document text
    • http://files.ultrasoundem.com/uploads/1/3/2/7/132710776/3267298.pdfIn PDF document text
    • http://files.creatingthyme.com/uploads/1/3/0/7/130739898/mulot_zuxolivozotub_zulutudi_xakenopini.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://cdn.shopify.com/s/files/1/0437/0992/3480/files/75668790988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/missing_interior_angles_of_polygons_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/93357545198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/6181/0076/files/barron_s_sat_subject_test_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8cb63f-8938-4a40-b041-1e528f87860b/78615160077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812d57f1-b3e9-4769-81c7-713c4a9c0813/tagumex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db92760f-5dc2-444d-adfe-fae6e2df59e9/teruwen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fb2bca3-719b-4b0c-9dba-e189854261aa/83424229767.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_off00005beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEB 5856 bytes
SHA-256: ba349a603a33f5c3044b28f99ad9366d560fffe532f05ba355b6115bf545b617
font_01_sfnt_off00006fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC6 14632 bytes
SHA-256: 31f2ea0ed7a897ac94608c213a7b885672abee4570463158f347bf8ffff94636
font_02_sfnt_off00009d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9D 8228 bytes
SHA-256: b9be274acf8449c06846494422cc62776353bcc821920649682cb651a652dd1a

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