Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7ab2d21508a35a…

MALICIOUS

PDF

42.7 KB Created: 2020-09-11 02:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 07ac7e28c47974266a7e81c76745f712 SHA-1: fba747445e261c76f497ec843f35a18c7c39531b SHA-256: 9f7ab2d21508a35a31041607f838a5fdc64382fdeaf5f74efe4eb36f57ecd714
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.club/pify?keyword=king+size+bed+sheets+dimensions+in+feet In PDF document text
    • http://lizalal.rachelhenson.com/uploads/1/3/1/4/131453960/wimupibixozotet.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/1/0432/0201/9487/files/exercicios_sobre_arcadismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/zirafatuvopabuniwudozuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/compensation_letter_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/tulisidiru.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3b9e23b4b9934d2db19b0d21ea6496d7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a3b54b_38c7a752269441bca25d60b5cdd4d251.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/930050_05ef7de58c564dc6aae6bdc9b0b54b80.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/868b90_0eb137a20e5f4dca8ca1dda71633b264.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8e9e2f_ac7736866c0b4eec878db18084b29084.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e1c37d_3c13f0ff605c482e8729635d7ea89daf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d78803_f37955110b3c47a4ba069d52337debea.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_off000069ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EA 5144 bytes
SHA-256: e31d52a370fc32134219c309bc263b2fe56cb69006c9ef011659245389086038
font_01_sfnt_off00007b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 10216 bytes
SHA-256: 43fb0cbc4808ecd1438e89690734ea4f6c167be0fd697d80bed8763944aae962

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