Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e1412a43555bbd…

MALICIOUS

PDF

64.2 KB Created: 2020-11-18 08:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3407d6432681cf8dc42b9128a745d570 SHA-1: 36fcd7b04ec2bf10794b570ff63bb2e760289e73 SHA-256: 80e1412a43555bbd22643023c00b9a0279b047619dd11410bcb56e0991aea309
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a high-confidence heuristic identifying it as an SEO link farm and an image lure linking to an SEO redirector. The primary redirector URL is 'https://trafffi.ru/123?utm_term=spring+hill+school+district', which is suspicious. While no scripts were directly extracted, the PDF structure and link farm behavior suggest an attempt to drive traffic to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=spring+hill+school+district PDF link annotation
    • https://wogivanozo.weebly.com/uploads/1/3/4/5/134586267/lejukavoriv_zizixewexesik_tegomunetogeg_gozanifeke.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/6bce78a86b019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxime/free_headstone_design_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e4858f-3eb2-41e5-a839-7842e8a81da1/suzuki_ts90_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/31096758806.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/eyecon_trail_cameras_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/xifitasebowanijasibaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/padineteludinuzukarefito.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/how_to_get_free_gold_in_bullet_force_no_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/bradford_protein_assay_vs_bca.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/lopikonilogixunofew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69c0cc2-8278-4322-9c72-e0f2d0daa0dc/wupogasixuli.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_off0000bed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED2 5228 bytes
SHA-256: 81914a1ca57f86178dbad22fa9cad05c8b3b8070cdab03b131746319ab5eb2e0
font_01_sfnt_off0000d09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09A 10436 bytes
SHA-256: c9071d86f7eeaaf521dad8e613f7ba7a21fbdb0c612000d2dee688f244d772a2