Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccdefe4308b9744…

MALICIOUS

PDF

47.7 KB Created: 2020-10-28 00:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 447e001a2774cef4e3ec6bb2dc867d1e SHA-1: 59d9577eeddfec2b3fc837f91c9f6ac4c4a10a98 SHA-256: 4ccdefe4308b974449cf48b0ca7262d5078b6a076c06db73799ad906c008ca24
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/123?keyword=madras+university+distance+education+courses+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f91b0161fc9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5f94c09330276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f91fd4a3bd6e.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/sutuzuwo.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/5089380.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/mutaribedusubu-xetuxisozepakit-xijaz-pivob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/37818700101.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/caribbean_business_book_of_lists_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/40736864589.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/14679970261.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/zuwodafapibonarakito.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/alexei_shirov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/clear_vinyl_wrap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/sopoguve.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/jurnal_ancylostoma_duodenale.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/2d_barcode_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/54655142340.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E16 5100 bytes
SHA-256: 20d620a45cfc5a78ba1ce110ec00b177d82504e6b5c04f6e93298010bbeeac9b
font_01_sfnt_off00007f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F83 3364 bytes
SHA-256: d8d72a3ad7725c4c44c122a4418777d988e8c6fac0eb97c6a28682ea4cfd14b5
font_02_sfnt_off00008ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE2 10564 bytes
SHA-256: a58d8396c6e1f18c6524ab9cf47b9eb3532dfddc88f3405b4d78086ac9f4fa1e

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