Malicious PDF — malware analysis report

Static analysis result for SHA-256 427b069cd5d6f53a…

MALICIOUS

PDF

42.6 KB Created: 2020-10-06 18:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 0fb92d31e182699e69e2bfe40aa0562f SHA-1: 7a414801379e86f53cb171a0b8f6c7ac4d03b6e2 SHA-256: 427b069cd5d6f53ab93a056d667847914b043f825ea76d29ee011495b515f08e
214 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.link/pify?keyword=pickaway+county+jail+phone+number In PDF document text
    • http://files.iamadamgreenfield.com/uploads/1/3/1/4/131411474/munulaz-lumewo-garupufefase-zomixonapuwife.pdfIn PDF document text
    • http://files.jackleamyteacher.com/uploads/1/3/0/7/130739718/abca9c7d539d8.pdfIn PDF document text
    • http://files.wkuprecollegepiano.com/uploads/1/3/0/7/130739508/xapula.pdfIn PDF document text
    • http://josas.fortknoxpaintball.com/uploads/1/3/2/6/132681670/1279310.pdfIn PDF document text
    • http://files.natashabehl.com/uploads/1/3/2/6/132681342/nowebupotafonow.pdfIn PDF document text
    • http://files.safeguardingaob.com.au/uploads/1/3/2/6/132682022/zazivisifebixi.pdfIn PDF document text
    • http://xivigotu.cfkayakrace.com/uploads/1/3/1/8/131872032/3294355.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/1/0436/8793/6150/files/89913115496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2483/6764/files/brooklyn_college_transfer_acceptance_rate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6036/2392/files/qin_empire_alliance_trailer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/1776/1702/files/vubekavivilubavolupopuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d4b8fa-9813-49e7-8c95-f03aaecd168f/57683150108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1364efb1-f5b2-4bba-b55e-8506fc0fce75/ribenagimosixaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfb2c08-affd-4758-8336-e609b244ba28/surip.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_off00006697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6697 5472 bytes
SHA-256: 13f09555fcac13b003eb248f00b80bef532c115953809eed617c748f77f6d5d3
font_01_sfnt_off00007922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7922 10540 bytes
SHA-256: 8e0a748b1d7db41352e66a32dc9a5099cff0a7e9bf589bbfaf9851687fa13af5