Malicious PDF — malware analysis report

Static analysis result for SHA-256 1522dd0b759b1619…

MALICIOUS

PDF

43.7 KB Created: 2020-08-03 19:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0b644a6f250c37e19e2a618440f538f6 SHA-1: b91f289769bb7fa8358edd6e9f4360d056480d25 SHA-256: 1522dd0b759b1619e5db283f2dd795db5a5aef144654f34d0ead7533cfaed810
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.cc/pify?keyword=algorithme+informatique+pdf In PDF document text
    • http://files.wiseowlwellnessclub.com/uploads/1/3/1/3/131380850/mixobufarudemar.pdfIn PDF document text
    • http://files.orthoappmobile.com/uploads/1/3/1/4/131453684/loluweg.pdfIn PDF document text
    • http://files.summertromboneworkshop.com/uploads/1/3/2/7/132712508/sikoromigola.pdfIn PDF document text
    • http://files.miramarmathassessment.com/uploads/1/3/1/4/131453124/9819403.pdfIn PDF document text
    • http://nizega.fabricationhardware.com/uploads/1/3/1/4/131407089/1231436.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/1/0436/0385/3469/files/28090993345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/symbolic_interactionism_perspective_and_method_1969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1260/1502/files/2861919051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/xekabawobibuwetaxoxebipus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37741658126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0096/2967/files/92774298649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/nisowuvejew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/kekaximusuwazaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4083/2678/files/dirixexopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/zenagadoradupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/83686259077.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_off00006934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 5392 bytes
SHA-256: b814a87ca43d5fa1cce6e99a4a439bdd206300ced76070462b37e4ac99b7d4ce
font_01_sfnt_off00007b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B56 11808 bytes
SHA-256: abc61574db7ebd408b43863a69a07e5dd1c5db27c8c943564582c769fc560975

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