Malicious PDF — malware analysis report

Static analysis result for SHA-256 38aa51edcfac77ac…

MALICIOUS

PDF

55.1 KB Created: 2020-08-11 15:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c06369113ef8f1b22fef80f53ad774ee SHA-1: b9696073827e6e119ea921cb1d2f991ed6972194 SHA-256: 38aa51edcfac77ace038fb184602c149add47d6b649edb1ef7b66f6cee1719f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a quality management PDF. The ML classifier strongly indicates maliciousness. The embedded URL points to a redirector that likely leads to a malicious payload. The document body, though heavily obfuscated, contains the malicious URL.

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.com/pify?keyword=definition+of+quality+management+pdf In PDF document text
    • http://magaxidi.karriejbutler.com/uploads/1/3/1/3/131398455/8dbfac134.pdfIn PDF document text
    • http://files.beautydestinationbykay.com/uploads/1/3/1/6/131606069/2641313.pdfIn PDF document text
    • http://files.thecenterforhopeif.com/uploads/1/3/0/8/130873922/suxix.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/1/0433/0687/7080/files/nalajenoderemomepofelefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8176/7841/files/caverna_de_plato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5754/files/widokadivizonazagofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2812/7650/files/91540944366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/gewafavabawakaxatowibilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/sobosarob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/28160537113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/sagajowid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/desafujidusijeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/balder_bayonetta_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/dokujuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/dixogowosaburovorufaje.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_off000099d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D2 5312 bytes
SHA-256: 003f6032548bf2c418a109107e060a5aa11e2239b23ff80e705fb1c37a0516a6
font_01_sfnt_off0000abdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABDD 10368 bytes
SHA-256: d6f44fbf737132787bef928fdd5d3954e3393b700c892eef4ef107041216ac79

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