Malicious PDF — malware analysis report

Static analysis result for SHA-256 2304746f8156f8c7…

MALICIOUS

PDF

67.7 KB Created: 2020-11-11 16:07:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 78f98fd0869f2f8d344c34b36e71bcef SHA-1: 696b29bbdc570abe947c0cc6fb5add5cb578d364 SHA-256: 2304746f8156f8c767477fcffca1cb3761f0ad28ed01ff73b7a08b3247a35d03
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a redirector URL, 'https://ggtraff.ru/123?utm_term=rio+salado+transcript+request', which is flagged as malicious. Additionally, it hosts a large number of external PDF links, many pointing to S3 buckets, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains text related to 'Rio salado transcript request', aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=rio+salado+transcript+request In PDF document text
    • https://medowiwufaj.weebly.com/uploads/1/3/4/4/134480571/pitibufigixosa.pdfIn PDF document text
    • https://lajakobu.weebly.com/uploads/1/3/4/5/134599687/8499742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_5f9d830d6d57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459464/normal_5fa77664393a8.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/womozazuwinorula.pdfIn PDF document text
    • https://kafutejitiripil.weebly.com/uploads/1/3/4/6/134625984/9997471.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/jaxesabi/crazy_frog_ringtones.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/cancionero_puertorriqueo.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/nidesoju.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/vortex_viper_4-16x50_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/salorofusuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/guide_post_prayer_request.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/adverbs_modifying_adjectives_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32588ee-b8ad-478e-bf7c-dddc7067724d/36138244996.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_off0000c773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC773 5200 bytes
SHA-256: 35fe9c9ea34ce986834671f390e7ce1590a1fb729436023fec04b8741982beb6
font_01_sfnt_off0000d92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92E 11592 bytes
SHA-256: cb96b82330dbf3c65c7dd74b46dfab7d84fac6050743bc5702879993e7098427

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