Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bf0fa7683a59af…

MALICIOUS

PDF

47.2 KB Created: 2020-08-21 19:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b2eb0881de04628e9bddc2f0cd7b495 SHA-1: 3f03081d54b8f982657c8a51f2c88a9df0f30acb SHA-256: 83bf0fa7683a59af4bb555044ae83282290dbe95b50935455700e1b7d7fc2014
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM. The primary malicious URL, 'https://ttraff.ru/pify?keyword=european+guidelines+hernia+repair', is identified as a redirector. The document body, though heavily obfuscated, contains this URL, suggesting a phishing or scam attempt disguised as a document.

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=european+guidelines+hernia+repair In PDF document text
    • http://files.clevelandpianoteachers.org/uploads/1/3/0/7/130775145/b222848.pdfIn PDF document text
    • http://munoretu.projectlodo.com/uploads/1/3/1/4/131453041/wurumonafozosafowor.pdfIn PDF document text
    • http://files.mrycpetcare.com/uploads/1/3/2/7/132740498/gobizorijuvusekaj.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/1/0465/1607/6694/files/atmel_studio_6._1_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0301/7373/files/accentual_function_of_intonation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0817/8850/files/basic_electrical_engineering_important_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/rudelodubixorubolarifuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7448/6421/files/robin_hobb_book_order.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2975/6064/files/ledanuvukemelovotikow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/xibudabexotafuzup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/alumnae_plural_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/23644747016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9229/5332/files/wupidirogagaxevuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/30485138711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/science_direct.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_off00007af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF3 5180 bytes
SHA-256: 77fabbd6606329c090bdf3f11cf05235850737c7e2dc68330bb3a4768b530106
font_01_sfnt_off00008c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C84 10268 bytes
SHA-256: b90fee98b4054d1ed562abb30e54b085f799521947edf0e7049641d4adfd51d0

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