Malicious PDF — malware analysis report

Static analysis result for SHA-256 751b2149a504f450…

MALICIOUS

PDF

39.4 KB Created: 2020-08-26 23:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2696ebfc456ffb52f444a95c9baf1080 SHA-1: e928a59e52cea8567369ad9d711331d750ed9e2d SHA-256: 751b2149a504f45013c72b62cc2b1df076e71111e17baf77aa75d0503a125424
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.ru). The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL is a high-confidence indicator of malicious intent, likely for phishing or malware delivery.

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=mankitsu+happening+ep+3 In PDF document text
    • http://files.mazeaudio.com/uploads/1/3/1/4/131407424/xokitofawazas.pdfIn PDF document text
    • http://files.jakebuyshouses.us/uploads/1/3/0/7/130775897/6527367.pdfIn PDF document text
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.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/1/0428/2220/5607/files/wutixudotira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/shaffer_annular_bop_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/sipiroxova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/45197545908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4488/6945/files/17988287555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/98286008444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/85482883606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/50266927749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/ikea_malm_bed_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8944/4510/files/66628318650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/15426213169.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C47 4284 bytes
SHA-256: d7ebb4b010e04949c43a729884e932add2967fb6a5fcd73bac7afaca5a6fffb3
font_01_sfnt_off00005b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B75 5184 bytes
SHA-256: 0606e80e044f78408c0be8430bca2e0120391d5c62ef88c262e7812f67fbf5b1
font_02_sfnt_off00006d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1E 9968 bytes
SHA-256: 6bd22054a7edc19ffbc8e10fd2498d57a17c49440fcc4ae8a1d92cbe43d50752

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