Malicious PDF — malware analysis report

Static analysis result for SHA-256 101e88338b41b7f2…

MALICIOUS

PDF

41.6 KB Created: 2020-10-10 17:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9ede1441e9ab2f3598d47d5e90dfa5c7 SHA-1: 7d89b121753e15bdebc19b12e433ab6f17e393c8 SHA-256: 101e88338b41b7f25b0a63aba80c7e226294d3c60e4f8a59dfc9c4ecf9bf528d
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=algebra+1+chapter+9+test+answer+key In PDF document text
    • http://files.twistedoysterboats.com/uploads/1/3/0/9/130969481/wijofiwekabuluf.pdfIn PDF document text
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdfIn PDF document text
    • http://files.amuseartfair.com/uploads/1/3/1/8/131857966/pemudanojef-gujore.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/dujelubojo.pdfIn PDF document text
    • https://site-1040892.mozfiles.com/files/1040892/31497149328.pdfIn PDF document text
    • https://site-1043601.mozfiles.com/files/1043601/24144536429.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/lugimutubojoxilelozug.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/pigez.pdfIn PDF document text
    • https://site-1043169.mozfiles.com/files/1043169/wafabofeba.pdfIn PDF document text
    • https://site-1039188.mozfiles.com/files/1039188/621288151.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/1/0483/7788/8928/files/beriserewizesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0536/1821/files/mass_effect_liara_planet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0638/6595/files/delta_tail_betta_care.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1328/1691/files/organizing_lifes_diversity_kwl_chart_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9132/0214/files/49594723250.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_off00006266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6266 5792 bytes
SHA-256: c3abf5270cf58d355b6cfd630af5bab2a85c065620d3784a0d13dd24a9b1e590
font_01_sfnt_off00007631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7631 10420 bytes
SHA-256: edbee4ba63fea7d73d4bcc9a01855ec3e3a0f1d96a057104c3de8b3f9fa57764

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