Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4dbbb2296a3c49…

MALICIOUS

PDF

39.7 KB Created: 2020-08-22 14:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 161e8544a42e80dcd9a36e81f89cc3a3 SHA-1: 5b0b0a5f234649c9c72d14bca6f8725c5598e5e6 SHA-256: 9f4dbbb2296a3c49c07df24fba42ff475207b1355741e3946e6c90b6da25d285
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are part of this link farm. The primary attack pattern appears to be a link farm designed to either manipulate SEO or redirect users to malicious content.

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=aesop+rock+labor+days In PDF document text
    • http://files.bingocompany.net/uploads/1/3/1/3/131379612/d2857f2095895b.pdfIn PDF document text
    • http://lupurix.interiordesignmadesimple.co.uk/uploads/1/3/1/6/131606490/mosusixepifituzog.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/1/0429/3358/4028/files/nivasivofiminilaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/92727564261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/duverugojitazuderuwug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/kiketozudukedidegamesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/canon_eos_7d_mark_ii_specifications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3065/5655/files/sowapanetag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3440/2216/files/adobe_acrobat_reader_setup_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1129/2829/files/bilingual_education_benefits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/94490461806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/61078799425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8090/8954/files/30251280586.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_off00005e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E23 5364 bytes
SHA-256: 2f04fabcdb8889fcedccb2208a7238c51a93f6cd32a43686621609276b3c41dc
font_01_sfnt_off00007069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7069 9884 bytes
SHA-256: fb906253db25a5ac61c4c6d77a72d2457d4019d67479235eee09e193d12c5a06

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