Malicious PDF — malware analysis report

Static analysis result for SHA-256 478fb8810db3b507…

MALICIOUS

PDF

45.0 KB Created: 2020-10-25 04:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 0cfcff4be5d86dac469cf00aa9423d77 SHA-1: 1d4064f59967ea6349e5d3cc9f22d1cd5c25245d SHA-256: 478fb8810db3b507ecc30b44264218142bfb3a452a85d37c4176c034294a589a
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/aws?keyword=formato+certificado+medico+escolar+para+imprimir+pdf In PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/2920847.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/0dbf8bf3a319.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/7005980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toguvaju/13235280290.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/48609931076.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/69580197062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1af8388-2ec9-471a-af17-5f4dfc8d8e48/33994292217.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/jamabegekaga.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/deadlock_in_os_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/diablo_3_season_18_wizard_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6172/2786/files/7947767375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8385/2695/files/63687764798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4794/3843/files/hedging_in_finance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5229/4055/files/wevazebupefij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/manuale_di_kinesiologia_applicata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7358/3257/files/sukijalise.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_off00006b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B56 5256 bytes
SHA-256: 7f988924c817107b729d28d5ff94b57baa78d16793d2b30b1976ffa86bb9ecb9
font_01_sfnt_off00007d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D20 12352 bytes
SHA-256: af37bbb98cb4bb4283526268c63170bb49c2a12d5c0f396b6f4f5d108dea9944

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