Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e68c99cd68533d…

MALICIOUS

PDF

39.5 KB Created: 2020-10-02 15:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: df96cc0e90e38d36043d855bc3d568de SHA-1: 506b0a067bdc99e276b3aa635501edfc28eb5e22 SHA-256: a8e68c99cd68533dfefd965c36296c6c02e42cd7bdc01e91dd9a5625a595d5a6
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.link/pify?keyword=united+limo+south+bend In PDF document text
    • http://xodinudam.pachydermmagazine.org/uploads/1/3/1/4/131454057/9875058.pdfIn PDF document text
    • http://files.yogadancelife.com/uploads/1/3/1/4/131483249/mikelobiwexakuvusesi.pdfIn PDF document text
    • http://kajaro.endogene.com.au/uploads/1/3/1/3/131398379/0dd34ee.pdfIn PDF document text
    • http://files.centerforspiritualawakening.org/uploads/1/3/0/7/130775231/repilogigura_kelidofafalovo_gadenedaloviv_luvebu.pdfIn PDF document text
    • http://files.windstonehoa.org/uploads/1/3/1/3/131384113/jifikiz-zafaf.pdfIn PDF document text
    • http://matavixig.walkonministry.org/uploads/1/3/0/7/130776485/4228624.pdfIn PDF document text
    • http://zofofufow.macdonaldsfarmersalmanac.com/uploads/1/3/2/7/132740218/gemiwene.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/1/0428/2092/7655/files/monster_mysteries_math_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1706/2558/files/87726588482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4710/3897/files/2919987820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6038/3910/files/surgical_intern_survival_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/castle_danger_mn_lodging.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/8658/6274/files/the_new_encyclopedia_of_the_occult_john_michael_greer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3534/8128/files/nuwudegobigaxuzoxo.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_off00005e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E72 4892 bytes
SHA-256: 07ce07ded2f244be2ab804b83268f52b320bc268b66f76f5601f2f1e47a6659b
font_01_sfnt_off00006ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF1 10112 bytes
SHA-256: 9a7e8ca851e0f6a9a7623ba2881a73c0339f6880143572fd77ea89581c657174

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