Malicious PDF — malware analysis report

Static analysis result for SHA-256 119c936077064401…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 15:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf14d5734a86443faf2a21599d22e5d2 SHA-1: 20f96552eb0c3d054361f983474bacb63190d75b SHA-256: 119c936077064401f33674ff929db4e2fc6145add398a62b71d7596fef8c284c
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to trick users into downloading potentially harmful files under the guise of educational worksheets. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=comparative+adjectives+worksheet+printable In PDF document text
    • http://files.salsamama.org/uploads/1/3/0/8/130873830/lisetutakotufoxepis.pdfIn PDF document text
    • http://labolatim.alaskarvadventures.com/uploads/1/3/0/8/130814995/zanum.pdfIn PDF document text
    • http://pivufarur.peter-m-acland-foundation.org/uploads/1/3/1/4/131407995/jurasarerutumasiz.pdfIn PDF document text
    • http://files.southgateanimalhospital.ca/uploads/1/3/1/4/131454221/7703610.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/1/0434/6321/3209/files/small_laparotomy_set_count_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/damipibatosalabikenaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/babozekufazexunet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/6751730088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/tratamiento_de_absceso_periodontal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/dorikepupumeselofederafax.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 7

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_off0000596a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x596A 5648 bytes
SHA-256: c4a1ebd093e5c044cc4a7c9ebd55a5f8f6dfefb32f775001bb8df9a06b237684
font_01_sfnt_off00006c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8B 11228 bytes
SHA-256: 4aa9eb4ed8f386e01eef44d91c4009746c8fb73bda5ce43562ecce75abcf59b4

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