Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9419f6f9bb95bd…

MALICIOUS

PDF

43.0 KB Created: 2020-08-22 15:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ad519474968885253fa783c44580e5d9 SHA-1: b460a4a192c25ec49d358114da41a66cdbcdec9b SHA-256: 8d9419f6f9bb95bd9c1275f7af13c8bf9f013ed52d099bc1fcfeb41693cd68cd
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=audit+report+filing+last+date+2018 In PDF document text
    • http://files.dynamicwealth.ca/uploads/1/3/1/3/131378838/pakojamitos.pdfIn PDF document text
    • http://files.nilesvp.com/uploads/1/3/2/6/132682974/dafudatug.pdfIn PDF document text
    • http://files.hisandherimprovements.com/uploads/1/3/2/6/132681579/0121cc4ee.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/1/0434/8959/1461/files/dadimumesikitetelujuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/rufeverojuxibofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13336488851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/97142288785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/10026940492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/90698183977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/fewogebupititi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/59354792680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/75773477946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1274/2564/files/92198513510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9074/5246/files/97247075657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1239/0038/files/busizuvidulijofavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/39758100345.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_off000067a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A0 5720 bytes
SHA-256: 20360becfdfb776b9f80bb70ff09cd8a399a303ffdeeeac66721e8c3684a38b3
font_01_sfnt_off00007b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B26 10536 bytes
SHA-256: ac16da27d2bb2d57f843eb61f7966ef78048fc7464b78346a42b4b8dcb7ff45d

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