Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4395f6dbdb6a8f5…

MALICIOUS

PDF

55.6 KB Created: 2020-08-05 04:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 730fd003dfb6aeab89fb5c92ce9e10d5 SHA-1: 5fe804f677b79183ec7c61e55c6a72f23c1e639a SHA-256: d4395f6dbdb6a8f519090ea24e4e4227da893f610b430fbeb4758991070b61a3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=assure+model+of+teaching+pdf'. This indicates an attempt to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains this URL, suggesting a lure to a fake document or resource. No scripts were extracted, limiting the analysis of further stages.

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=assure+model+of+teaching+pdf In PDF document text
    • http://files.photopat.net/uploads/1/3/1/8/131856991/77ef801a2e72.pdfIn PDF document text
    • http://files.stilettorunning.com/uploads/1/3/1/1/131163684/9531622.pdfIn PDF document text
    • http://files.pagesinmypassport.com/uploads/1/3/1/6/131637679/5940590.pdfIn PDF document text
    • http://files.transawareness.org/uploads/1/3/0/7/130774979/1165998.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/1/0431/5955/2166/files/wopag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/wolfgang_puck_pressure_oven_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/donell_jones_where_i_wanna_be_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/fizugexesadusexaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/34704117903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/15610815169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/17977180068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/jetixaburiberiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/41567859621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/9686208098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/vesatosoravitumutozatiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/60343451280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/22427246491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9064/1047/files/20816278414.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_off00009b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1D 5556 bytes
SHA-256: bd631b6c0465fdf77ebb02734e533203f1cc7004624811db8f09957684e3fc41
font_01_sfnt_off0000add8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD8 10460 bytes
SHA-256: ae2c3b6f47c7a6c2fe083fbbe7654e39c191a3e096b502c9ee6f6dcca1942e4e

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