Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b8fae5fba3a410…

MALICIOUS

PDF

45.1 KB Created: 2020-10-26 12:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9aa21d149a5bdeb7816ce285c048fd61 SHA-1: 2171d4310cd7e80633fa597b0b5fdaec65595b7a SHA-256: e1b8fae5fba3a410c3be112649e61f991b12024e838d739841c16c18b042c3fd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.com/pify?keyword=refrigeration+tools+and+equipment+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f8a3010ddf81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f870b73db815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_5f95ae646b3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f8ba73d6cf29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f91a26c737ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5f9309d6a67ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f89b66fd5450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f92d80994d0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f880b15b8a25.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/60592dd0-5300-4e8b-97d8-ed6cc2550904/eve_pvp_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec0e10a-4fad-4649-955c-ff853feddda8/zatiduwadupezonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ccf0d71-6665-4dcb-ad34-983b330278f3/gawuwajakininunedatotel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c91589-e467-492e-8232-03fd61e476ac/mebug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74589278-dfea-4439-a071-fa1360f2d3c1/soparakujibizabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19c5928-e7d4-4d16-b831-c53390da441f/6788383471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53338403-53b2-4cdb-89eb-378731dc705f/sijijus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d5df35-3352-408c-b1d5-8f119a5175d5/71055442014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac10e0d-cc57-4b86-a18c-8fcad96db623/82934932752.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/diccionario_hebreo_biblico.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/practical_atlas_of_tung_s_acupuncture_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/atonia_uterina_tardia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8669/4550/files/lofofakure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1896/7450/files/poodle_rescue_texas_dallas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2957/3031/files/dujezijozotafiguwokorekul.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 6

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_off0000704f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704F 5496 bytes
SHA-256: 02446a81703d52535940357a0da57f1256ae8b7897e6cc57d86fcfcc7296519a
font_01_sfnt_off000082e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E8 10632 bytes
SHA-256: 66b26e332e02af80f1858f59609bfef8dc8e05c274931df96c6ec958caa987cb

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