Malicious PDF — malware analysis report

Static analysis result for SHA-256 62939884cc9e1870…

MALICIOUS

PDF

43.7 KB Created: 2020-08-26 10:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f92ec1580c5301e0e4a6487b9129f7e SHA-1: b65e587b08c5b016c4f0801ee07cebabd63225c3 SHA-256: 62939884cc9e18707a9290df98434aaeb36046621dea550d8ba8a12dc39d6bc0
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service (ttraff.com) disguised as educational content. This suggests a phishing or scam attempt to drive traffic to malicious infrastructure. While no scripts were extracted, the presence of embedded URLs and the PDF's structure strongly indicate a malicious intent to redirect users. The ML classifier also flagged this PDF with high confidence.

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=vocabulary+packets+greek+and+latin+r In PDF document text
    • http://files.paraspear.com/uploads/1/3/2/8/132815367/walikam.pdfIn PDF document text
    • http://vokobi.safehavensavings.org/uploads/1/3/2/7/132712615/4312637.pdfIn PDF document text
    • http://files.theogkicks.co/uploads/1/3/1/8/131856723/guvapuk_vuwigokif_jagakoxuz.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/1/0434/5489/0149/files/fraction_word_problems_adding_and_subtracting_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5708/files/wondershare_editor_ocr_plugin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/early_vedic_period_and_later_vedic_period.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/vujijemofalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4222/6854/files/5479827519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3137/5521/files/textbook_of_biochemistry_biophysics_for_nurses_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1952/3480/files/drools_getting_started_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0162/5252/files/pineapple_cake_images_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/44537621431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0917/0856/files/internet_explorer_free_for_android_phone.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_off0000615e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615E 5512 bytes
SHA-256: 30348aeb3f9b60339aa28526e0e199d33cb3a26b88cec949be273c1373b3b30c
font_01_sfnt_off00007423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7423 15188 bytes
SHA-256: a4b702b6bc0218d88ed7639d66b62887fea3ea0b5f634b968c9bec6aa25fe0d6

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