Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c51805ea7d7aede…

MALICIOUS

PDF

54.0 KB Created: 2020-08-22 14:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f46fc5026e5b965969d834e8eb7278d5 SHA-1: 44db21fdc34cb0e8b439a34294a7315185e20900 SHA-256: 0c51805ea7d7aedec3af8d88f78e02f7824bdf1d124ca8d9b99e0b24f9bde444
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector and part of an SEO link farm, designed to phish users. The embedded URL https://ttraff.com/pify?keyword=cbse+age+guidelines+for+class+10 is flagged as malicious. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise malicious intent with seemingly educational content.

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/pify?keyword=cbse+age+guidelines+for+class+10 In PDF document text
    • http://files.marisatcohen.com/uploads/1/3/0/7/130776536/rinamiwe_tuzikajonaxejiz.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/1/0438/7454/9928/files/34631685674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/bgp_attributes_explained.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/lg_34um95_p.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5567/5552/files/accrued_income_effect_on_balance_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3955/9573/files/algebra_questions_year_6_sats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/45832741011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/rafamoratij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/volivuliwuwuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/24538695615.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 3

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_off000094e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E3 5428 bytes
SHA-256: e689f87410155bba000eeba9c846efd9c818df6f8f64a28f997da1cef2272944
font_01_sfnt_off0000a765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA765 10588 bytes
SHA-256: 829d56f33d9f6447602e74ee90669701948bb7e5ecbd6269c03bdc2c56f74e44

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