Malicious PDF — malware analysis report

Static analysis result for SHA-256 828b7d36cc342cf8…

MALICIOUS

PDF

33.6 KB Created: 2020-08-08 06:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 81f76044d9773da73b803035ec3cf580 SHA-1: 29db528e390f8c450ca251aae9a9d63b6003e0dc SHA-256: 828b7d36cc342cf827e5094a9cf39ab67dd8e70eaa20da9cc7323e78a1694bcb
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.com/pify?keyword=catalogo+de+canceleria+de+aluminio+pdf In PDF document text
    • http://files.iannazzofineart.com/uploads/1/3/2/7/132740307/c5c8b44a.pdfIn PDF document text
    • http://files.mackaycameragroup.com/uploads/1/3/0/9/130969506/f82cbb66.pdfIn PDF document text
    • http://files.awwe.org/uploads/1/3/0/7/130776043/bopopezoximafotas.pdfIn PDF document text
    • http://files.cmefonline.com/uploads/1/3/1/4/131406448/389ed5007187.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/1/0446/9719/0556/files/doterra_probiotic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/alle_ableitungsregeln.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuzodatusowajukekef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/stokes_theorem_statement_and_proof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/2782022807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/dujadufekalatovojij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7731/0366/files/bwv_974_adagio_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/5999822927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8763/4338/files/37043091674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/40452646410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/zojakavozarudufabomadan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7768/8743/files/31301735971.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_off000046e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46E8 5204 bytes
SHA-256: c8690d56df87855cd6d22bbf6504d6a2a7a8cf3509e33f1bc1763a985a8b687b
font_01_sfnt_off00005881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5881 9660 bytes
SHA-256: b8c12c454ba4400809763a20049a2d6e142ac3abfd4ab68f980e487ceaf70581

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