Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f72aa462a538ac…

MALICIOUS

PDF

53.4 KB Created: 2020-11-03 02:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c2230f8bf0cbcf2a5277e24d7304ed89 SHA-1: b900a00fbb60e189572252dddc5f566dbf210057 SHA-256: 42f72aa462a538acc03085a15271c0b95cf8d799b78402a5aa54fe7885661de9
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. This link, 'https://ggtraff.ru/aws?keyword=hidden+bonfire+in+lost+izalith', is likely used to direct users to a phishing page or a site hosting malware. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the redirector is a strong indicator of malicious intent.

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.
  • 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://ggtraff.ru/aws?keyword=hidden+bonfire+in+lost+izalith In PDF document text
    • https://nirorozarijax.weebly.com/uploads/1/3/4/3/134342495/xujibesatapugiz-bonebilolapisuk-supinuwuzopa-dajoga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/57f25787-93a3-43a3-9ff9-609004d253c1/ganadilanorala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2baec09-0321-4b20-add9-c5cf0203f720/arun_gawli_image.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3954/6263/files/gejala_klinis_demam_berdarah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5639/8246/files/kigefudasepek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4828/3543/files/zoom_room_controller_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfec8f0-a94f-4e73-a3ab-e9f46420d9cd/56950683603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5f0712-bc5d-4a18-88a9-1aba791eb498/76090927512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6964/3170/files/katolapiguxebit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdabdc39-2797-4113-be64-7cd0e7ac86e3/ropebozovof.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/meperasojinulawatebuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/186da003-8570-49a8-bb5e-0343004b3955/2762653346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/100a933c-958e-47c8-adb5-fffc7e02497a/kevipez.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9645 5144 bytes
SHA-256: c8e3db278c2fe06ef51630f88c497d7b47f27092cbaa6c227a8fba23bab21e16
font_01_sfnt_off0000a7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BF 9820 bytes
SHA-256: 79cb26ee5dfae9b528d80609bb484bf4c43258159b49220cb1ea6441e60437af

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