Malicious PDF — malware analysis report

Static analysis result for SHA-256 a280d48da340ed9f…

MALICIOUS

PDF

43.4 KB Created: 2020-10-14 20:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e29b9bfdee38b7de2970ad46901325c4 SHA-1: e7afb3d84c1977778dc05de0560658a6493e8779 SHA-256: a280d48da340ed9fc81c5d40043258206249918428f8289620de058dbffe117d
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=civil+engineering+articles+pdf In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/a7f91e4c9.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/wonudejefezuvin_rojusowowasap_wixurokete.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://naxufubiromu.weebly.com/uploads/1/3/0/7/130738890/lulozepufirisun_pekodipib_lulajirir.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/66666e4d6f5.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/ac115b69bda4.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/8911912f5f58fde.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/1/0430/6580/2905/files/pedagogia_del_oprimido_resumen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/zavuzimipinidegutoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0497/2186/files/guxakopixoguzap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3821/4810/files/xevijeseva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8962/4224/files/my_happy_games_gamebox_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7992/1564/files/zikipavexorogikibuxokal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/5952/7847/files/programmer_analyst_resume_indeed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/egyptian_cotton_percale_sheets_made_in_italy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0193/2706/files/madupozopawifudije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2381/7640/files/descargar_f_stop_gallery_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7721/4884/files/66683808373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9230/3254/files/89477312654.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_off000069ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AD 5288 bytes
SHA-256: 85bc5d0497abe2b5c416057ff692b549f64ec1971074f05decbd0d8874ea593e
font_01_sfnt_off00007bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB7 10984 bytes
SHA-256: 211b78fa7ea5ffaf075e11e7ee6340290a037001f3ef505033eb24e5e74fd4da

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