Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93d48996e22e761…

MALICIOUS

PDF

112.5 KB Created: 2020-11-01 10:31:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6188f282eb80516152a44daa9ae6be6b SHA-1: 1e404ae0883727faba7d6a1f9df3a4f8ff579f31 SHA-256: d93d48996e22e761bd74609ba4294b400ff8048769af2e40ddb7bc999c2008ce
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a reference to the same malicious URL. The presence of numerous external PDF links suggests a link farm or redirection attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://ttraff.me/123?keyword=big+timber+metra+schedule In PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/refipedizixunop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tarajix/plastic_travel_mugs_with_lids_bulk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8980/3460/files/racing_moto_games_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3047eb01-db01-4cb4-8e2f-cecbcb1c4c88/67314114867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9750/4926/files/ipod_nano_16gb_7th_generation_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079a7238-1558-42e5-9a62-c75da7b7a1ed/nokem.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/28197119761.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/elite_dangerous_orca_ship_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/sling_tv_apk_for_android_box.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E3A 5544 bytes
SHA-256: 296d73cc0d8a22f8c458c4e0dda7307dcb81f62acccab15f260e09c65739d1c9
font_01_sfnt_off000190e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190E1 10436 bytes
SHA-256: 02aedaac0270203a5a32bdaedc10dcc6fdba6a8a21f7d649453cc90d191c7f44

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