Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b20beabce453957…

MALICIOUS

PDF

34.0 KB Created: 2020-08-19 07:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27e0fbee9dccaececab29f6a41c1c7a7 SHA-1: 9d1901beb5061e7039bf0eb2139863895a4a185b SHA-256: 7b20beabce4539570a0106a7e32ed1d3b27d4c8967d2d1599aae00303211cbaf
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious infrastructure, specifically identified as a redirector for SEO link farming. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=woofer+song+video', which is also flagged by heuristics as a malicious redirector. This suggests the PDF is designed to lure users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded URLs and the ML classification strongly indicate malicious intent.

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=woofer+song+video In PDF document text
    • http://files.sklgtraining.com/uploads/1/3/1/4/131437378/3ff4af81a01a3.pdfIn PDF document text
    • http://files.stephanieportfolio.org/uploads/1/3/2/7/132712127/df19eb3d53c.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/1/0437/8597/8018/files/32906900257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7845/1349/files/asos_curve_formal_wear.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/zabomirodaxuboresolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/5943316747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/69963031097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/fe_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1564/5856/files/negujomipuxevog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/bumogeledudokufosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3617/0657/files/sixidojuvulevenisamurum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2807/9004/files/brothers_grimm.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 4

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_off00004723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4723 4908 bytes
SHA-256: 6e4c2c309f367501f6fdcaa790f5eafddf4ffdbc678f42bd26aa730c9addb1cf
font_01_sfnt_off000057fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57FC 10452 bytes
SHA-256: 91a6135c36441abb8964548e45d48e4a63d6f2af911608cdb40cf9510ca885ac

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