Malicious PDF — malware analysis report

Static analysis result for SHA-256 788c0ca79c967909…

MALICIOUS

PDF

41.5 KB Created: 2020-08-05 23:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ad83604df95f6dd08f179c7ba67e70d SHA-1: e510342dc49b2c4831bf41450f964881b7e8988c SHA-256: 788c0ca79c9679091f31eea772f67f50a619c3be04dccbc0cfbbf99ce4d81ff2
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, also contains the same redirector URL, suggesting an attempt to trick users into downloading further malicious content. 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.ru/pify?keyword=advantages+and+disadvantages+of+internet+for+students+pdf In PDF document text
    • http://files.niassestudios.com/uploads/1/3/0/8/130874318/b919e96e4ba.pdfIn PDF document text
    • http://files.korahcvs.com/uploads/1/3/1/1/131163788/guzit.pdfIn PDF document text
    • http://files.grayslandhoa.com/uploads/1/3/2/3/132303238/03276.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/1/0431/8117/9029/files/6382998632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuxekenosagulowagegur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/gusipigabazirufalizev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0187/1512/files/27303722123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/fovopudabatuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6211/6002/files/38075880805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3625/3087/files/where_is_ffxiv_log_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/wobikifawezamofesijutix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2432/files/66259966448.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 8

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_off000063e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E3 5228 bytes
SHA-256: c8f814e2f29241fab9a042aab96acd26846ddb75134f52ead7d7f3f5119ebd6c
font_01_sfnt_off000075c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C7 10340 bytes
SHA-256: d338976b3a25da5d78d40dbc8d5d1a3a2c828e58a9e2f7be4b52ed045d602d8c

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