Malicious PDF — malware analysis report

Static analysis result for SHA-256 8387670bfcb785c3…

MALICIOUS

PDF

35.6 KB Created: 2020-07-27 08:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 579e906c25107ee1887bb08e5801fa81 SHA-1: 828a0db251f1c19130ed646838c76335b7dc7303 SHA-256: 8387670bfcb785c302c6a3b583a52ff6b3ae4b0fa5c9e7a3e2d253b7b38129bc
194 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are identified as malicious redirectors or part of a link farm. The document body, though heavily obfuscated, suggests a lure related to 'Assamese all new song 2019'. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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=assamese+all+new+song+2019 In PDF document text
    • http://files.allisanellwood.com/uploads/1/3/0/7/130776490/vofawedapo_nalupufamepeti_lemafaxajogeno.pdfIn PDF document text
    • http://files.supportbisd.com/uploads/1/3/1/8/131858540/1039494.pdfIn PDF document text
    • http://files.jolietwestlibrary.com/uploads/1/3/2/3/132302894/b4f3c6401.pdfIn PDF document text
    • http://files.mrsvietnamworld.net/uploads/1/3/0/7/130740033/biwamufu.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/1/0429/5278/6074/files/bokekisivufelaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/6778789670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/42756649920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/15422892056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/kofisonezudoduvuguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0902/files/fusirudaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/79056689788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/kobudodakusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/boragapokoxufimij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/nedubefaviponitop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/18559935921.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 8

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_off000051d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D2 5132 bytes
SHA-256: ebd58a248d42c14bab76abbc01a1e8b0e89bce5f1cd8d35fb8b8adcc2b41b5ce
font_01_sfnt_off00006339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6339 8904 bytes
SHA-256: 849351a06439f97269722ef964aee30362c6e44089c0e0bae82e6144c6cb9795

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