Malicious PDF — malware analysis report

Static analysis result for SHA-256 89245ebc76bd9b17…

MALICIOUS

PDF

115.0 KB Created: 2020-08-06 03:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 805937b0773b39b9ea58d0a2ce75caa5 SHA-1: 50fc979dbfa7207faf723eccd1444af02ceab03b SHA-256: 89245ebc76bd9b1790d477d45f9d61c61b9a6edf6010d2adab288e443b0394e9
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, pointing to the URL https://ttraff.ru/pify?keyword=caballo+de+troya+1+pdf+online. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous PDF links and a ML classifier flagging the document as malicious reinforces the assessment of a phishing or malware distribution 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/pify?keyword=caballo+de+troya+1+pdf+online In PDF document text
    • http://files.dsmtoolworks.com/uploads/1/3/1/0/131070678/6e54ea9.pdfIn PDF document text
    • http://mipefed.bethadice.com/uploads/1/3/0/8/130814124/eca5dcdba3830.pdfIn PDF document text
    • http://files.gascityformeremployees.com/uploads/1/3/1/3/131378771/8214463.pdfIn PDF document text
    • http://files.kenairiverfoundation.org/uploads/1/3/1/4/131453034/simivutefavazu_rutame_jatobu.pdfIn PDF document text
    • http://files.michaelsrockyriver.com/uploads/1/3/2/8/132816042/9130266.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/1/0430/7949/9940/files/2754834367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/vevixozunemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/xoduwixexos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/jekowowepafiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/f0_9f_a5_b4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/xixopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/aorus_app_center.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/comment_relier_plusieurs_en_un_seul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/mewolituso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9140/9558/files/75373331918.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_off00018518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18518 5056 bytes
SHA-256: 88fd831814befd227c24cbc633527c6cd5e32dce370dbbd0f63654ca1549c50c
font_01_sfnt_off0001965d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1965D 11932 bytes
SHA-256: a87c64453f25967f6f258e63f3bf1febac1a3bb3fa312f2c2ab8ff36bfbd17e6

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