Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dadb105b78fb65a…

MALICIOUS

PDF

37.5 KB Created: 2020-10-25 18:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 290a64a6c252e5052c3cd34e3540988f SHA-1: 153c2b51e10a9910a452324fa1788b467ed99960 SHA-256: 8dadb105b78fb65af18319b8027f36f500fd43ca51928daf947cd060116ceb8f
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/aws?keyword=tagayun+building+design+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_5f9521ea799c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5f8bb27c054b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f8e3e1166261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f8cb949e9f5e.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/c807f.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/7c1401216eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9833b133-58ea-4c07-a627-c90ae58925a5/95032675451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/samediteto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8309/3910/files/vekewimeforupodumulikez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0767/9923/files/drum_synth_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0294/files/novel_habibie_dan_ainun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9918/5312/files/rugulogavurevutaxako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4741/8518/files/99049858844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4396/6104/files/susisepubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7981/0203/files/wukudok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/joronasegogosirisulozulur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2626/7291/files/pepexibawarim.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_off000054c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54C4 5304 bytes
SHA-256: 9c34edc751e133474503bcbd0b6dd880a7ec63dcc61b1225faf6b5b42094f365
font_01_sfnt_off000066e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E3 9916 bytes
SHA-256: bba850bf92bde914f6a7df355999e1c2cc2355a86a4fce3af6ce0fa7886fc4a4

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