Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bed44e22e5d850f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-20 23:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6e624e17efa8ff9b4cadf6e1f98b8a6f SHA-1: bd7c61837cb6e6016e1a2965bc30eb4e29b8ea22 SHA-256: 1bed44e22e5d850f7aa224bf0a1bb6cb8f84f2b0d8d580aa3e7d7aa01e84c92f
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.cc/pify?keyword=8+standar+akreditasi+sekolah+dasar+2018 In PDF document text
    • http://files.tarmanartroom.com/uploads/1/3/2/7/132740553/2838660.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/1/0433/9816/8727/files/80167529492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4891/0498/files/wotediwiwameti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9054/2741/files/zuxiseru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/advanced_java_programming_lab_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/tesumenifomokikenesurij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4845/1739/files/tonuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/dutevejobitomanudoken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/gnostic_gospels_catholic_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamawogedeveredu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/saruzoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7249/5519/files/vefobidakujanabapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/aislamiento_de_enterobacterias.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_off00006f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F02 5404 bytes
SHA-256: 33b657f08c47a9132656f897b2958e13c3e1a792558fb91e0d0220ed53c000a0
font_01_sfnt_off0000814c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814C 9908 bytes
SHA-256: 74a81cd32f0ac29ee0be497afcef3cfad01c436f6976929dad47c9780d1cc1ae