Malicious PDF — malware analysis report

Static analysis result for SHA-256 1759bffea90e7e65…

MALICIOUS

PDF

40.4 KB Created: 2020-09-21 03:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dad1cda51304e6855741dc4351832a51 SHA-1: 8ca545d9a89037010cea46b6e8fa858ad7d148eb SHA-256: 1759bffea90e7e65572aee5a655ef79b421c6430b5072707167c3614ee2d5ecd
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.cc/wix?keyword=christopher+sullivan+death In PDF document text
    • http://xumubeto.tangofloorspace.com/uploads/1/3/1/3/131383544/4764045.pdfIn PDF document text
    • http://files.greencastleaeroclub.com/uploads/1/3/0/7/130739922/galoba_xafegola_puwedoju.pdfIn PDF document text
    • http://files.susannaabeldesign.com/uploads/1/3/2/6/132682042/2334c483.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/1/0431/4628/1122/files/58444027424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3749/8271/files/gapupubijolomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/windows_server_2016_cal_licensing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/belt_conveyor_design_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/astrology_for_the_soul_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/fimawibopumofaxivowefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/popigiwanubipam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/7283/8821/files/18410704890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3460/5725/files/bsc_nursing_syllabus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/joragepijavopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/fosezubakuzuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/body_checking_ed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/mega_movie_hd_apk.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_off000061c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C7 5012 bytes
SHA-256: d7e05aef5fd7c44e2e28313aba6dbaec815dde2de4ea0376394c80ab04493f69
font_01_sfnt_off000072c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C8 9956 bytes
SHA-256: 09415c68f24f7efd994aaf7cad2f9bea28faa38785d1b86ca5ebcb58de89cc79

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