Malicious PDF — malware analysis report

Static analysis result for SHA-256 7720812a159b0bc4…

MALICIOUS

PDF

41.4 KB Created: 2020-08-26 08:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 832e86a99873ac6132e0b8ddb47aacbc SHA-1: 5355e70724a2f719a30f9647bbb446c2df34154f SHA-256: 7720812a159b0bc48f3eca47fb9c219d39c3c493aae34e4e8daff10569babaa3
194 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ttraff.cc, which is likely used to host phishing content or distribute malware. The document body text, though obfuscated, includes the same URL and references to other PDF files, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

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=critical+thinking+and+problem+solving+skills+for+the+21st+century In PDF document text
    • http://files.hospismelaka.org/uploads/1/3/2/7/132740905/041ba10b05aeba.pdfIn PDF document text
    • http://suraruz.obsmanual.com/uploads/1/3/1/4/131453133/7814200.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/1/0440/9825/7048/files/43863716490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/47143490263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/national_osteoporosis_guidelines_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8815/1458/files/imdb_hitman_s_bodyguard_parents_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3075/8044/files/bradescard_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1875/9842/files/levedewij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/what_is_a_weebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/dethklok_tab_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/11044934315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/fox_halftime_report_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/japolaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5746/1913/files/android_podcast_app_auto.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_off000061d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D2 6024 bytes
SHA-256: 8f6e0ccbcd69450763545097a9a26b3991d37a7cdb6954b6d00f03e4abe393b6
font_01_sfnt_off0000762a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762A 9960 bytes
SHA-256: aef938f4125815a466143a693d87841d66dfb9aa53672678c60123da7ecaa7a9

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