Malicious PDF — malware analysis report

Static analysis result for SHA-256 78551b4dbd3aaa72…

MALICIOUS

PDF

36.4 KB Created: 2020-08-14 05:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9227048d845d867cde1851aa7dfe0ab1 SHA-1: 07cda52c2a9d1bca110f09baecf11d1e8ceb31c9 SHA-256: 78551b4dbd3aaa7267e830aa62e35858357b406745af735a2a0748a253baf2c8
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 (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting a phishing or scam attempt disguised as educational content. The presence of multiple embedded links and the ML classification strongly indicate malicious intent.

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=ap+calculus+integration+worksheet+with+answers In PDF document text
    • http://files.movingclay.com/uploads/1/3/1/6/131636946/pilus-lesezim-jinibekesomomav.pdfIn PDF document text
    • http://saxare.textboost.net/uploads/1/3/2/7/132740278/88598e21.pdfIn PDF document text
    • http://files.meplusthreephotography.com/uploads/1/3/0/8/130874633/3582178.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1618/2184/files/beautiful_in_white_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/dieta_atkins_livro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2534/0328/files/mularusesof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4274895189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0859/7927/files/40752266194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/zerulonorimumol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/rarolib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/95704007145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/50759857534.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41FF 5220 bytes
SHA-256: 745e22e175cb226a33d688e445b44714472db0f165cedd4d74832020c2991334
font_01_sfnt_off000053c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53C4 10180 bytes
SHA-256: 0beecd6e2d4ee488205b085399dc53cb8f06dc967c544d3dd3c4248a79a298db
font_02_sfnt_off00007676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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