Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbebbb72677938d…

MALICIOUS

PDF

55.4 KB Created: 2020-09-13 01:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00e27f6eda632bbc690e40f4a3ea1337 SHA-1: 2767e8a173913ea54608dc3976fffac1b1655436 SHA-256: 4bbebbb72677938d6cb30ee027e3d0ccbebccb48b0eb028b73ad4371a45016b4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector URL that is associated with malicious activity, specifically a lure for "bank of internet usa complaints". The PDF also hosts a large number of external links, many of which point to generated SEO PDF links, indicating a link farm designed to attract traffic. The ML classifier strongly flagged this PDF as malicious.

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.com/wix?keyword=bank+of+internet+usa+complaints In PDF document text
    • http://xoved.psignologic.net/uploads/1/3/1/1/131164250/dokajurojitezamapoj.pdfIn PDF document text
    • http://files.moritzscience.com/uploads/1/3/0/9/130968968/8d0573.pdfIn PDF document text
    • http://rizebuwon.noroydesign.com/uploads/1/3/0/7/130738799/webezuladubupuserek.pdfIn PDF document text
    • http://files.friendsofislandviewbeach.com/uploads/1/3/0/7/130775730/sidodujadunijafapuv.pdfIn PDF document text
    • http://files.ordernutsabouttella.com/uploads/1/3/1/6/131636890/376ff.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/1/0431/0745/1041/files/deep_ecology_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/autobiography_of_a_river_ganga_in_2500_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8783/8886/files/67146338064.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6924eb_a4d7c693059e4e8ea0d168c3d087fafe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/197ed4_7948d03b306b47c28904498e21a48ab4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_362636c542d14cf99d234a49f50086fc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4d998_3945d0188dd24e2294bdb8f1075da81c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/35dc59_cb6133fb5c7a47b6a73554a89367ddf9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/536122_ee146b458d9c47d2898d489d68688c00.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7082a_d419f2a5a02d49ad81cc40636931031e.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000900f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900F 5272 bytes
SHA-256: 35a57bd4f8af8edbcdfdd9cfcfb231545ec7ea8cc1f4b3598bb5af5d3906a743
font_01_sfnt_off0000a1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F1 14872 bytes
SHA-256: f64f2575ed5302c87c3dc18a5e8b837f6ff7df2746198cd3b97c8839324d2817

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