Malicious PDF — malware analysis report

Static analysis result for SHA-256 70aaf5cce423aa60…

MALICIOUS

PDF

59.6 KB Created: 2020-10-27 02:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f85c79687d9ed5ab501129e3f8b88161 SHA-1: 4da6fd4f5620e4d7dcc235ac25123801437de223 SHA-256: 70aaf5cce423aa6023a18e62acd9c253de97857856daa7734f3affd2e04966de
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.me/123?keyword=blood+of+elves+pdf+free+download In PDF document text
    • https://putidano.weebly.com/uploads/1/3/4/3/134388569/buwaxogeruwi-joxoworurinezis-jovipubab.pdfIn PDF document text
    • https://bagexefegaluja.weebly.com/uploads/1/3/4/3/134393574/c03ee5224db33d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f89fcee7e608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f895f7c9f535.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000aa2d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000aa2d.bin)
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/lanuwulaxodobugolapur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2743/0059/files/document_to_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1748/6503/files/substratum_pro_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/58047453333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/sinopaforeronobatonuzuxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2145ebc9-7600-4894-a668-5f8f3ac6a0d7/15730426955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47ac3b3-74f2-4a85-a90e-bb72818dd490/20954703207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762f4158-7579-4a5a-a7d4-ac892ceb4711/nuzesadokeruvokakezukok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5889/5254/files/did_you_get_it_spanish_worksheet_answers_unidad_4_leccion_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9212/2034/files/14228724920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6443/8173/files/5261498628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6293/3676/files/rinnai_combi_boiler_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7292/8409/files/6530019958.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/manorama_weekly_old_novels.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/rumejurojixowinin.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/autoregressive_conditional_heteroskedasticity.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/avenue_south_residence_floor_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/vamajokugupenad.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_off0000aa2d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA2D 5236 bytes
SHA-256: 15595a29121da5a1d9b196a6fa3d4ef16764335775ff78c63cf724b0e65b7485
font_01_sfnt_off0000bc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC29 10756 bytes
SHA-256: af30d7587736046d83acba5e3362663884e96ab870a52e86fab233a5e439a56c