Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d80001d54b43cc…

MALICIOUS

PDF

43.8 KB Created: 2020-10-02 14:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 41507f225f9e7ee48cd449d21b239ee0 SHA-1: f0f6b8579a19a241e666d3475c84a2df201c52a5 SHA-256: f8d80001d54b43cc094bc50f420ab6b0436d24b3b0e7d51da1b5027a8ad311d0
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://gettraff.ru/strik?keyword=alien+races+book In PDF document text
    • http://files.telluridepreschool.org/uploads/1/3/0/9/130969876/5910915.pdfIn PDF document text
    • http://kitofu.honouringourbundles.com/uploads/1/3/1/4/131453723/sawanabixato_rasuk_ginotedulajeti.pdfIn PDF document text
    • http://files.aces-energy.com/uploads/1/3/0/9/130968935/fusevopel-bumefimibex-tuxobajewi-tajudo.pdfIn PDF document text
    • https://site-1038627.mozfiles.com/files/1038627/dosumapaxiwibigeba.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/68696467901.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/1/0477/4277/9548/files/40502991646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/carbon_auto_theft_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6525/3792/files/einstein_theory_of_brownian_motion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2812/3295/files/13300798118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/pocket_fantasy_hack_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/finding_area_of_triangles_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/5224/7461/files/nifozomaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3337/4115/files/keeping_up_with_the_joneses_parents_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8730/6658/files/download_baldurs_gate_2_apkdata.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_off00006c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C53 4984 bytes
SHA-256: 6a4c303fb91920d15d11fd9d207b3c2b8dfc5dfc6a8035952cbba2ca53714551
font_01_sfnt_off00007d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D53 10968 bytes
SHA-256: 16227df3659705868c3cca69726ea798ad078a9582edf02e1e64c38bf60d9091

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