Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5acbd69b919003…

MALICIOUS

PDF

47.7 KB Created: 2020-08-04 14:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96ba2ce3819cd24bdfcc55eba57d0faa SHA-1: 86dbbaf54bd3e381eb7b16388e2d7a8aedd75c5a SHA-256: 0a5acbd69b919003fd354cafb4a5a8eae7438be327007f89d0418330afdaff38
194 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) known for malicious activity. The document body, though heavily obfuscated, also contains the URL https://ttraff.ru/pify?keyword=atomic+timeline+pdf, suggesting a lure for free downloads or information. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a malicious intent to lead the user to a harmful destination.

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=atomic+timeline+pdf In PDF document text
    • http://files.carolynriker.com/uploads/1/3/1/3/131383727/9949920.pdfIn PDF document text
    • http://files.aprilfricke.com/uploads/1/3/1/6/131606069/vakerituru.pdfIn PDF document text
    • http://files.pilatesbyalison.com/uploads/1/3/1/4/131437680/6824837.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/1/0430/2965/9797/files/77113872948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/assessing_student_learning_outcomes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/60643343517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/princeton_review_gre_math_subject_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/1069717878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/21965169532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5332/5215/files/varanasivaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/dosiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/class_10th_biology_notes_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65496272691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/dyslexia_journal.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 5

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_off00007f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 4808 bytes
SHA-256: 17df67b5b63d80bc6498bd8929a30ea9e6df9b7703af1838402781d2fa38bad3
font_01_sfnt_off00008fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA0 10212 bytes
SHA-256: 10b64b283b242de386c18b891ec7382751f16d349b327ca13e30099207e86a37

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