Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3fee5020277e13…

MALICIOUS

PDF

35.2 KB Created: 2020-11-04 06:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 38809748840578a5032fa914aeeb3759 SHA-1: d7fc9c79b4cd6a84b4b4b0aae3e8ff6480ec0b5f SHA-256: fa3fee5020277e13522fe6409ab8ca29c4ba0510973bfa746ad64be2016e8a84
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file is identified as malicious due to its structure, which includes an image-based lure and a large number of embedded links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.me'. The document also contains a link farm pointing to numerous other PDF files hosted on disposable domains, suggesting a campaign focused on SEO manipulation or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 35 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=verbs+starting+with+ca In PDF document text
    • https://mukaxonalox.weebly.com/uploads/1/3/4/5/134580963/modakovotolofawaben.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/pakipetikotopol_vadupobop.pdfIn PDF document text
    • https://gabumisuxenumu.weebly.com/uploads/1/3/4/3/134366459/916c4d583bc.pdfIn PDF document text
    • https://dedodewoluxo.weebly.com/uploads/1/3/4/4/134402612/6856493.pdfIn PDF document text
    • https://sukevimekixav.weebly.com/uploads/1/3/4/5/134599702/kaxutepoko.pdfIn PDF document text
    • https://gexumuvebevo.weebly.com/uploads/1/3/4/3/134312536/fec8c1ed1abdd07.pdfIn PDF document text
    • https://pawusimogi.weebly.com/uploads/1/3/4/4/134444718/b48cbc.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/bojuwexigemubidexoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f903d5d8480c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5f9c9f1c0b50d.pdfIn PDF document text
    • https://beritugemob.weebly.com/uploads/1/3/4/3/134332724/d6f1e82ec7.pdfIn PDF document text
    • https://zutovabofilosu.weebly.com/uploads/1/3/4/3/134333865/milizeb_dumasefipu_makakare_zadut.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/5cbbd4a5-dcd9-4df6-8e79-f0baabf7685e/kilidirirepawozu.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_off00005366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5366 5228 bytes
SHA-256: 89cd6f4576f63ce545ed83333d10dad0877b4c2723a8f3dd55e7e9b46d13a724
font_01_sfnt_off0000653d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 7976 bytes
SHA-256: dd22ae328f1c088f54940c1274c39ec34fe567604916af400d0203be03ac7198

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