Malicious PDF — malware analysis report

Static analysis result for SHA-256 3535adb32e0b80d7…

MALICIOUS

PDF

35.2 KB Created: 2020-10-28 17:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c0105107e2702cbd5c464774c611065e SHA-1: 05249f247e274d3923fb5e988f8468eeab0827ae SHA-256: 3535adb32e0b80d7379393b8925b84fcdff05b18b64f78bc30e6188f5e43f3f5
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to disposable hosting services and a known malicious redirector. The document body, though obfuscated, contains the URL 'https://ttraff.me/123?keyword=bbq+stain+on+white+t+shirt' and other PDF links, indicating a likely attempt to manipulate search engine results or redirect users to malicious content. The ML classifier strongly supports the malicious verdict.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=bbq+stain+on+white+t+shirt In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5f94e56b8b269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381083/normal_5f927d026546e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413462/normal_5f99021902532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5f98f7bfc5eb2.pdfIn PDF document text
    • https://papokerudinex.weebly.com/uploads/1/3/4/3/134310480/takis_sijabulogarisib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5f8f68a87128c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424672/normal_5f98c98a7e679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f8936e2e5f1d.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/mabexa.pdfIn PDF document text
    • https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/8069858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_5f95e8be0f131.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/sojobefil.pdfIn PDF document text
    • https://nobaditidiz.weebly.com/uploads/1/3/4/2/134235496/86170.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/bce3db3471.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/tifuwuw/medicinal_chemistry_books_yogeshwari_download.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/tipos_de_barreras_arancelarias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/wazovojipafilemakixaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6765/4311/files/winupadafelewib.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_off00004eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAB 5148 bytes
SHA-256: a11641da6bf6a273ea649faa7ced8403ff4795da4074735684474ad348d9dbe2
font_01_sfnt_off00006041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6041 9108 bytes
SHA-256: 7394101d3dcc7631981f2acd0f2abd1e2b984dbc1e0277a72a9b722d8fb6a461

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