Malicious PDF — malware analysis report

Static analysis result for SHA-256 933434c3e6b20304…

MALICIOUS

PDF

44.1 KB Created: 2020-10-28 22:04:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e5fe40ad5d7822e44b39bad7b7023897 SHA-1: 150bf1f52d04be5bdaef7992396fe48bf20450f7 SHA-256: 933434c3e6b2030436f0e5853e3299072bc5388ade4e6e6078e28a1f8c357b00
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.link/123?keyword=sociology+chapter+2+culture+test+answers In PDF document text
    • https://nebemono.weebly.com/uploads/1/3/4/3/134331812/ee5573240.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/9671421.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/1415014.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/1e571d73d1fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006da6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006da6.bin)
    • https://uploads.strikinglycdn.com/files/fdf83954-fd35-421d-b1bf-b2121b392257/nefeweminunikefil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0124/2015/files/82258139144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/29919011242.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/chakri_dynasty.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/african_american_inventors_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/25829410260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/gidapirumowebewonujazoj.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/tenob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9218/4740/files/new_contract_old_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3932/3837/files/english_connectives_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/best_cargo_shorts_for_hiking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/la_mancha_negra_casariche.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6308/5722/files/77391876097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6996/7013/files/managerial_accounting_14e_garrison_noreen_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8937/4621/files/the_book_of_lies_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/merujejulen.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 extracted file (font_00_sfnt_off00006da6.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA6 5624 bytes
SHA-256: 62939f458964f722464c951be57e1d7fd7558becdcd81c80b567aefee0788961
font_01_sfnt_off000080e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E0 9944 bytes
SHA-256: ec34464ea5a253c1ee8e70aec11d1d96b4485b6b009f1adc9b0d6f581b83f16a