Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4194d6dbe73091…

MALICIOUS

PDF

40.5 KB Created: 2020-08-25 05:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad15566082aeac56a9744795bfbaaf7d SHA-1: 68463f3141d8b1eadf92bce089656ebb80217065 SHA-256: 8b4194d6dbe7309142a7b29609d3046a6871d6dc636c56f1f0bfc73ae195bb6d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=adjectives+exercises+for+class+3+with+answers'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on various domains, suggesting a link farm or redirection strategy. The presence of a critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the ML_NYX_PDF_MALICIOUS flag strongly indicate malicious intent, likely to redirect the user to a harmful site.

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.cc/pify?keyword=adjectives+exercises+for+class+3+with+answers In PDF document text
    • http://jatijide.saydellittleleague.com/uploads/1/3/1/1/131164312/muverefelisuboronap.pdfIn PDF document text
    • http://files.wleeaa.com/uploads/1/3/0/8/130874413/likedukivegewoj.pdfIn PDF document text
    • http://files.roxaniart.com/uploads/1/3/2/7/132740665/butusiraz.pdfIn PDF document text
    • http://fosow.chavianosmind.com/uploads/1/3/1/4/131406947/sawekeradu-jipag-sezepoxofux.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/1/0429/9282/8579/files/xabikitirogopomuxuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/52161642913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/64934754734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8558/4801/files/prosedur_amdal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2478/4292/files/rasavikeselututusolosofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6371/2671/files/corpse_bride_theme_song_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/wesakek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4016/9374/files/59100031382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9673/4880/files/26778154479.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 2

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_off00005f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9C 5556 bytes
SHA-256: 74cd288391841ed55cc907a43afe32663bddd4a8236fb274fe26a343e0549ebe
font_01_sfnt_off00007292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7292 10156 bytes
SHA-256: e462fd2b0f4f186a46010fc62e8228279ff2501c91d762d5ba4066cf9942e929

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