Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d794483b783a72…

MALICIOUS

PDF

54.0 KB Created: 2020-10-25 18:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 384a594dd6cc8ca67b8601dee2c3e3d5 SHA-1: 9d604c326dcc58fc5f2165f76c12790a8cab0b27 SHA-256: a0d794483b783a72b153918e725cd64d754792ca80bf4853fcc3f8d8504ed4d3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ggtraff.ru/aws?keyword=renaissance+periodization+training+template+pdf. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to trick users into visiting a malicious site under the guise of a training template. The ML classifier also strongly flagged this PDF as malicious.

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/aws?keyword=renaissance+periodization+training+template+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f8b56850e366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5f8da91da0641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f92da8b0af02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f872f8b78d4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f8ab931b0e83.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://uploads.strikinglycdn.com/files/58b02da2-4e2d-4662-8cd3-7fe1d55dfd2a/nuzovagafozupuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d36bb0e-7030-423f-8379-b94283b1597c/85712213100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d49cbcd-833f-4c23-b3b2-147f16e33d28/dajijomivafopexojaxuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/free_download_islamic_books_in_urdu_format.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/symbolic_interaction_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/goodreads_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/xevixuvopusegufuwujux.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/spontaneous_abortion.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/tupemutewivutopal.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/905664606.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/vunotinaginodu.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/adobe_illustrator_cc_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9031/9804/files/kiwof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4951/5684/files/45715683444.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_off000083f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F0 5320 bytes
SHA-256: fcc944468265cd1c5cb74b105e534921f0753aa532bda10f5859d619751fd7bf
font_01_sfnt_off000095f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F4 11668 bytes
SHA-256: 6499bf4c4e92e2d0d86ee8670cba0ea94af1afdb5c747eb3a4fe98683995dae6
font_02_sfnt_off0000bc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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