Malicious PDF — malware analysis report

Static analysis result for SHA-256 622715c51ebf1084…

MALICIOUS

PDF

41.3 KB Created: 2020-08-11 13:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae4a9966e713437ea47a662b14fe1e06 SHA-1: 7d7663c32db00d804289c0b6a88f4c22bd30e67a SHA-256: 622715c51ebf10840258d70c3fd7d6052db007bf97537624e5e04431fe5b20e6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, includes a URL that is also flagged as a malicious redirector. This suggests the PDF is designed to lead users to malicious sites, likely for phishing or to download further malware.

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.cc/pify?keyword=ejercicios+resueltos+de+centroides+y+centros+de+gravedad+pdf In PDF document text
    • http://files.copperchiefstore.com/uploads/1/3/0/8/130815014/7798345.pdfIn PDF document text
    • http://tunabomi.conceptfrontier.com/uploads/1/3/2/8/132814930/6766961.pdfIn PDF document text
    • http://files.dogodogo.ru/uploads/1/3/2/7/132712233/a765cf91460497.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/1/0429/4826/4089/files/91223909948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/neurological_voice_disorders.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/94785308255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/jetevenekuwiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/usps_customs_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1396/2919/files/mutufidit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/45204585061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/fejabubofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/xerifemigevumosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/40258050690.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_off0000617a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 5520 bytes
SHA-256: f9e8562877a261675bbfcd26762f791b2e99135c5558874d2fb018183147764e
font_01_sfnt_off00007467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7467 10964 bytes
SHA-256: 12a2ff593bc5118227ea8a90c80046916ba133f7ceebc91cccb863e0c8ff1fe3

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