Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b931ef1c8f82b4…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 09:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67edea279a6a7f3aab5b76dc00d6d9c7 SHA-1: 81d206ba04e9267eea2e2ab16c7b6fbff29b0299 SHA-256: e8b931ef1c8f82b459b2977720c16773719344e8a221f367606fe910352a8a6c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a coordinated effort to distribute malicious content or phish users. The primary malicious URL identified is https://ttraff.com/wb?keyword=chicago%20referencing%20style%20manual.

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/wb?keyword=chicago%20referencing%20style%20manual In PDF document text
    • http://files.mtprospectlimo.com/uploads/1/3/0/7/130775098/bixigosutogiveg-satutazikigu-jiwufumowe.pdfIn PDF document text
    • http://files.robinsonpainting.net/uploads/1/3/1/4/131453276/forojatipobi_bomobera_lilefozikile_wosuv.pdfIn PDF document text
    • http://zodugo.amyannaart.com/uploads/1/3/2/6/132696414/relurafam.pdfIn PDF document text
    • http://files.garlicfeast.com/uploads/1/3/1/3/131398362/e2ffc12526.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/1/0438/0947/2669/files/tibalibetuxavonel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/muromajonaxaselowexedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/mysql_date_between.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/cracking_the_sat_chemistry_subject_test_16th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/77292123746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/63874756595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/rudul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/xemonalasutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45865267400.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 4

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_off0000668d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668D 5300 bytes
SHA-256: 32f23c47651490d90a1d1592ef8bab7d60a9533201d11f1ed1a81bdba31e2481
font_01_sfnt_off00007874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 10240 bytes
SHA-256: b9db40a738e54cbb9edf291ab2cc97165d134701eaca63874d817a8790f82866

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