Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f5b1817bff5cb0…

MALICIOUS

PDF

32.2 KB Created: 2020-08-08 08:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf851ea6ab9ef62ec53bdb852c06a5cc SHA-1: f4abb4144290f811594df103df1ea10ae46d59a7 SHA-256: b6f5b1817bff5cb05c9f52b32ddd4b4f4374098de6295d3fbfc582b8826819e0
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing campaign. The primary malicious link, 'https://ttraff.cc/pify?keyword=absolute+value+equations+and+inequalities+quiz+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users to a potentially malicious site. The ML classifier strongly flagged this PDF as malicious.

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=absolute+value+equations+and+inequalities+quiz+pdf In PDF document text
    • http://files.mainecowboymountedshooters.com/uploads/1/3/1/4/131406861/839261.pdfIn PDF document text
    • http://lopanerol.natteyallockps.com/uploads/1/3/0/8/130874457/sonuwenogu.pdfIn PDF document text
    • http://files.vieparlafoi.com/uploads/1/3/0/8/130874148/repenemu_satodorafunuwuw.pdfIn PDF document text
    • http://files.ntfbiac.com/uploads/1/3/0/8/130815303/2507797.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/1/0435/8458/5883/files/ketudeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/grammar_worksheet_for_high_school_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/xarepuxekanifitezibimese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/26403839525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1482/2811/files/vuzeligenunesawazeveven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7747/6260/files/95979960853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6728/5404/files/job_reclassification_letter_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3555/files/liwifuwupatezamakaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/bafule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/86881882759.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 5

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_off000043ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43AB 5304 bytes
SHA-256: 43edef0d5b4783e7ea3c53f1aadcea9f1ec227e58103aa259ce070562a23aaf0
font_01_sfnt_off000055d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55D2 8840 bytes
SHA-256: ae128274b9504ba0285d9dbaa639681fa690594d5bebfcb09edde4d7fa7ef1eb

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