Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c89bd9acc2feee…

MALICIOUS

PDF

37.0 KB Created: 2020-10-03 04:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 51e2787591a3ffa7f094a9c446f3518b SHA-1: ebf9ceff20d45dc74a34575dc45254afe8affd54 SHA-256: 50c89bd9acc2feee6abd34a3aa1f2ad96feb6e1cd0e0d985351455d1d57e8661
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://ggtraff.ru/strik?keyword=strategic+management+dess+7th+edition+pdf In PDF document text
    • http://takoro.shorewindbordercollies.com/uploads/1/3/0/7/130738705/fapodidu.pdfIn PDF document text
    • http://luwiw.aurorachang.com/uploads/1/3/1/4/131483222/sevipufibinulel.pdfIn PDF document text
    • http://files.creatingthespaces.ca/uploads/1/3/1/6/131606227/3822600.pdfIn PDF document text
    • http://bufugumu.frogpigpug.com/uploads/1/3/1/0/131069934/salowusavulo.pdfIn PDF document text
    • http://jogagumek.skilledpaint.com/uploads/1/3/1/0/131070894/jidebuzizeva.pdfIn PDF document text
    • http://files.wadehudson-authorpublisher.com/uploads/1/3/2/6/132681901/cc6fded6b.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/1/0494/9970/1406/files/kasobunejatanafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/1943_steel_wheat_penny_wartime_emergency_issue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5043/4211/files/vicente_fernandez_historia_de_un_amor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0566/8260/files/2_ton_engine_hoist_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3960/8991/files/machinery_handbook_29th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/ghetto_street_fights_brutal_violence.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_off000053f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53F0 5720 bytes
SHA-256: 1f5d0fd662c880d5322df823444a396fc3d1f8acdfe950c728d8a98837f78831
font_01_sfnt_off0000674c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674C 9308 bytes
SHA-256: fb1a9b516773db9559f191c7446440e9a40d422c58ba77412f31225bd98c2b4a