Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a4c30caa3543b9…

MALICIOUS

PDF

47.6 KB Created: 2020-09-01 13:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7d593d0a1cb3d19c12480283a74fdb4a SHA-1: 360bab409cf7da42c5efff6571704b84b2f1c820 SHA-256: 89a4c30caa3543b98cf9aba17ee473b7996cddf5ea4dbbcaf8a3806c5b4e0325
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=transformations+of+logarithmic+functions+worksheet+answers In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6b2aed063c5e409faa55d8d0464ea948.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f64db8_6d18cc010d5b47e8bea549ea508d62f9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_71122891b4c64d9488dcbdef0f8eca2c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9b33c5_240032af76b24723b003bf486a8511a0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f63f29_23714d54c47345ad9cba9d1b2a560089.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4e402_19882c65d4e148ce9fea484dab992c5a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/78c764_67aeeaa7d445408fb8e8c538b62065df.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/28b3f7_6fd8980c3e4f497495b76a8fd06c6502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/gosaxopagipatezezubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/2691939660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2920/6939/files/guided_maneuvering_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/esercizi_analisi_periodo_con_soluzioni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/coroners_reports_qld.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1ec9cfcc516241eb91aaee5f9f0ea4fd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0bcf16_fa3da9ae2577466488764d25048d77e9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de60da_bda237cb7af647158c7d99fdbd2236af.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_off00007502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7502 5400 bytes
SHA-256: 8a5386a44960c10aa0112ac317f53b2ba6389993345cae294fa34004c738c234
font_01_sfnt_off00008748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8748 12948 bytes
SHA-256: 9a6152c55f9065292a40bafb67a3a53ea09fb57d010a0bd7f7c60ac45d9c613c

Open this report in the interactive analyzer, or submit your own file for analysis.