Malicious PDF — malware analysis report

Static analysis result for SHA-256 1858f467e4e10a15…

MALICIOUS

PDF

63.9 KB Created: 2020-08-22 18:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af10af48e6572bf16e9e5c4f91959078 SHA-1: 8cf0a770b207b2ea601f494ec999a38f1c6f813a SHA-256: 1858f467e4e10a15506002c953c74611120a37be5737b0e43e69577c1b37988d
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially obfuscated, includes the same redirector URL and several Shopify-hosted PDF links, suggesting a link farm or phishing attempt. The ML classifier strongly supports the malicious verdict.

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=acknowledgement+sample+for+report+industrial+training In PDF document text
    • http://files.jazminoniris.com/uploads/1/3/0/7/130775280/karur.pdfIn PDF document text
    • http://xidik.wheatgrasspublishing.com/uploads/1/3/2/6/132680981/e547940.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/1/0433/5039/2984/files/vizaxeputorivofokome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/11130425304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/salukaguwajup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2836/4968/files/77845645936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/binary_calculator_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/juwivalivedifowab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/bv_raman_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2228/4960/files/nulodedokod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/cigna_international_medical_vision_claim_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/jowukegalul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/tivixika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/adverbial_clauses_exercises_advanced.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_off0000bccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCC 5620 bytes
SHA-256: 50965db411eaed5347882a442fbff788f41795798c3dd5f0f9969d3e119092e4
font_01_sfnt_off0000cfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE8 10076 bytes
SHA-256: 43e96581e86d15e141886017bbec4017b722588955450d05d4c0b5601dfd8c0a

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