Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe1d8ddfeb41506…

MALICIOUS

PDF

40.4 KB Created: 2020-10-05 16:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8c355194f50b4efbaed30bf8106bf8f0 SHA-1: 34c0c7a06cdaeaf296e7fcf6e8b54fbd6f207d83 SHA-256: 1fe1d8ddfeb415062ac275129cf7ed6d1ad9e5e610be0ccb8879c8ed567b72f1
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/pify?keyword=palm+trees+in+the+snow+book+amazon In PDF document text
    • https://site-1040400.mozfiles.com/files/1040400/75595705030.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/80784754238.pdfIn PDF document text
    • https://site-1039198.mozfiles.com/files/1039198/jutekiwudulop.pdfIn PDF document text
    • http://files.skywartooth.com/uploads/1/3/2/3/132303395/fifidafebamefapubu.pdfIn PDF document text
    • https://site-1036812.mozfiles.com/files/1036812/bodobo.pdfIn PDF document text
    • https://site-1037881.mozfiles.com/files/1037881/girun.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/1/0440/4926/8886/files/oru_kuppai_kathai_movie_online_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9662/7618/files/31300834428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9318/0070/files/65957382798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2718/5315/files/harmony_public_schools_el_paso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3868/7900/files/sex_drugs_disasters_and_the_extinction_of_dinosaurs_prezi.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_off00006036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6036 5272 bytes
SHA-256: f44434ba3561eafcfb4c89179dbca13bcb0bc2eded41c77c922bf1177f8216b5
font_01_sfnt_off0000720d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720D 10224 bytes
SHA-256: 4cef57d789fc8f8729839946812cb3308e56d95ba9f5665a1ca4e2f9263ca0c2