Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe63921d17d57b7…

MALICIOUS

PDF

45.6 KB Created: 2020-10-27 15:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 839900d1aa0fd22baac37a5bb17f260e SHA-1: d5a0544bc0f668033faf93929f8d5fc20a94cea4 SHA-256: 4fe63921d17d57b71b959742047253779283ddb1d5b22be1e403e752e24e94c3
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.me/123?keyword=red+nose+puppies+for+sale+qld In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5f8b00bb64653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_5f8f860bab3ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5f8e8bab878f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8cb18adc058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_5f92d4f26ff5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8de424b661b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f95ecf6aa2c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f949132ba7ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6870/0868/files/japoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0063/3768/files/93405069608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4660/8282/files/xplayer_apk_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5998/2748/files/merge_photos_into_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/approximation_and_estimation_in_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/52655542131.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/candoral_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3487/7850/files/good_directions_lyrics_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0660/6498/files/wave_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/dicto_comp_can_be_used_for_assessing.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/pofeza.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/toto_africa_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/62111233554.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/soal_barisan_dan_deret_kelas_11.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/autoit_manual.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 4

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_off0000724b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724B 5168 bytes
SHA-256: 86268755dc7b5f3c6ec99a227f905b900b7beff6409f00f85142288dded53d09
font_01_sfnt_off000083ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EC 10920 bytes
SHA-256: 3b5a8730a3929a8a510c18204a6f19e21b71393c5329d8579a330feeb924171d

Open this report in the interactive analyzer, or submit your own file for analysis.