Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e7ef7ea7a8f7c7…

MALICIOUS

PDF

41.0 KB Created: 2020-09-07 08:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a1395a5326f43258885c28c80b5377f0 SHA-1: 393ba8065bfce8e55fd2f698e37fda42a5280436 SHA-256: 01e7ef7ea7a8f7c70331351ccc99a673a8a3e37b7862b3b1def7789260a9229a
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/wix?keyword=4.+3+maths+fs+initial+assessment+answers In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/ccb1c6_3a426b1527374ea0ad69bb002dbf8ad5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/90d19e_82abdfc2474743c19ced5357f89c6414.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce77c6_790f97814d6e42278652c5cb7f9623cc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/dudivokosujaruzijuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/75536314196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/ds3_bosses_in_order.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/dj_sound_effects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/scholarship_essay_sample_about_why_i_deserve_the_scholarship.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/ccie_service_provider_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/diablo_3_best_barbarian_build.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/kidotikur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2453/files/burpees_workout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/79637315275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/8603/1522/files/nutcracker_march_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/21022871444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/55430066564.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_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 5288 bytes
SHA-256: 2060f3a1b3dd0d3edf34220d414fada909c53346fdd5b1529cef768d76715206
font_01_sfnt_off000074d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D7 10552 bytes
SHA-256: 4a7f83c9e4ca402f6aed135d8300a1e2344ec5dac4440d6c6921bb2dcc2a7bc6

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