Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3760b964014e311…

MALICIOUS

PDF

48.1 KB Created: 2020-08-09 08:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9a43489c131abfb02f457bbb94f6d861 SHA-1: 25813b66f1baf872a2b8d911072bb7e6e3038f13 SHA-256: e3760b964014e31159a6a7a874450a8beff452c0b0a8230956d6e450a39911e8
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.com/pify?keyword=chemistry+textbook+pdf+grade+11 In PDF document text
    • http://xidulad.pumpkinandsprout.co.uk/uploads/1/3/1/6/131636612/483ff.pdfIn PDF document text
    • http://files.azaryahofficial.com/uploads/1/3/1/3/131379014/f22a3d3402f68.pdfIn PDF document text
    • http://files.ladyhoofers.org/uploads/1/3/2/7/132710797/c2cad5632d.pdfIn PDF document text
    • http://files.abbaproperty.com/uploads/1/3/1/8/131855992/fimatezenukub-paninivizelezej-widujufab.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/1/0430/3483/7149/files/20798788301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/80621109921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/60258811258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/81301806831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0124/7906/files/historicism_and_new_historicism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/properties_of_skew_symmetric_matrix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/28284560605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2532/5467/files/vunozanenasodema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/42411157676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/46009535599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4272/6310/files/vibifunitebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4349/4815/files/jinixosudit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/one_day_ukulele_chords.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_off00007c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C84 5752 bytes
SHA-256: ba5e2f19c0e99d3a763eea403b0a2b90a875040546c8b95e2ed3862baf4b0652
font_01_sfnt_off00008ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFA 10388 bytes
SHA-256: bf45860315b6d639e436f4074c47aef9e157412af015b7624f6df9865f31317a

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