Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb943f57c5f3db9c…

MALICIOUS

PDF

51.0 KB Created: 2020-10-24 00:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 039497f7ce82d8c57b36f17b8623c142 SHA-1: c45517a2a34e66ae3b92a67e86ff7093d0324ac4 SHA-256: fb943f57c5f3db9cf130b6160c4bc21093621361c09241c4c7613eb5f9ba32a1
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.ru/aws?keyword=anita+roddick+business+as+unusual+pdf In PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/9390274.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/8f6691065860e.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/kuxameribaxusoviti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f8737e2191be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5f9345fe49fcf.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/1/0486/0300/5086/files/sitatelazupejatopirinote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8049/7349/files/proposing_karaoke_box_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8451/9834/files/manual_xerox_altalink_c8045.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/jukev.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/43197891201.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/mefisufepinetave.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/analytical_biochemistry_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/tetokajelofagirurofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9669/7749/files/kexuxuxulifotosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9963/6390/files/mysql_create_database_utf8_if_not_exists.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/46798036653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2064/6048/files/global_theme_store_miui_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3771/6391/files/47672712780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/giramubepobufomibegu.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_off0000868d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868D 5344 bytes
SHA-256: d8e01be4eb8ae376cc14e715e662303f209d03588837c6776a4b06a1b4fbefdb
font_01_sfnt_off000098c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98C9 11456 bytes
SHA-256: 37f1a7100e7113c1ca38d48a47003c833ab42dfd00fbbbb0e3b6008a15761839