Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec811c19900f7bc5…

MALICIOUS

PDF

47.2 KB Created: 2020-08-11 00:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a2e10b3a89d592ce1597071a2565ab6 SHA-1: 068cd7d587a6f576a7ad8fd68f1194ad69bb1d5e SHA-256: ec811c19900f7bc5796a37c007e03e3fb2f3dfcd9d8fa71ad3fa366200740a0f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to a known malicious redirector at 'ttraff.ru'. Another heuristic indicates a 'link farm' pattern, suggesting the PDF is designed to host numerous external links. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wb?keyword=fasciola%20hepatica%20pdf%20microbiologia', reinforcing the malicious redirector finding. The presence of embedded URLs and the malicious redirector strongly suggest a phishing or malware delivery attempt.

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/wb?keyword=fasciola%20hepatica%20pdf%20microbiologia In PDF document text
    • http://pajopo.jonolick.com/uploads/1/3/0/8/130814328/a56d9e066a.pdfIn PDF document text
    • http://ranuv.nwadventureguides.com/uploads/1/3/2/7/132712615/tatufomigemaporoxile.pdfIn PDF document text
    • http://xawof.shepherdscott.com/uploads/1/3/0/8/130813528/0ee4d62ffbd8.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/1/0429/9702/2879/files/adobe_photoshop_7._0_tutorials_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/doweketifiwub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/74398365377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4449/3720/files/tratado_de_dermatologia_belda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/sopoketejagedowefalikesug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/60606108882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/rainbow_play_systems_assembly_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/apa_manual_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/68245687195.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 3

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_off000078d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D3 5664 bytes
SHA-256: 690ea6b3f2aa9290bdd64adcc59b22815b2c50b4e5c909518f8360c581b3ef63
font_01_sfnt_off00008bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEC 10980 bytes
SHA-256: 63b169d4b8b2ce5907988568dfb46c03fb6d9c80374e7ea9f5a03e1e0fd625e0

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