Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd9d1c698fa45e8…

MALICIOUS

PDF

43.0 KB Created: 2020-08-28 10:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6bea5e32d363847f762f81c59a146290 SHA-1: 309eac580f6a200073c4c0d4e6a4607933b99acf SHA-256: 6bd9d1c698fa45e8695ded66144055fc9eca8c91b249b7ad62254f7e1b6c4aab
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=city+green+book+read+aloud In PDF document text
    • http://xejedibi.briteinitiative.org/uploads/1/3/2/8/132814930/8c23221dd.pdfIn PDF document text
    • http://files.cleocork.com/uploads/1/3/1/4/131406506/e73caf854c46.pdfIn PDF document text
    • http://files.jackofall3.com/uploads/1/3/0/7/130739598/3facfe791.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/1/0433/0110/9920/files/pozepediwinewejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/28939310307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3842/5766/files/niniratuwipotifekuxuzuxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7329/0908/files/acrobat_reader_protect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/6843098832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/93226554415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8466/9088/files/gexajimozowizujopetiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/memoxarusawiregofed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5302/1344/files/2d_barcode_generator417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/alison_moyet_dbil_en_la_presencia_d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/74902665192.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_off00006a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1D 5024 bytes
SHA-256: 3c3f4c6e88f67931243d2c0a3e8f17fc3273f07a0168942b8b7724c805bc4f91
font_01_sfnt_off00007b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B47 10524 bytes
SHA-256: 66d837a0bdf54c270b946be06f832d7f7f2b43956c3fa0bafd9d7074b9906eb4

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