Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a4da0613530c3e…

MALICIOUS

PDF

44.9 KB Created: 2020-08-24 01:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f4a1789a638408402ce54bb61ac14b7 SHA-1: f4b6f575134d1d4f506061663ee789946ac1f744 SHA-256: 09a4da0613530c3ee126208114617e38f1555600a147b35e96cb53525c2c3125
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that leads to a redirector, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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=gmbinder+formatting+guide In PDF document text
    • http://files.biesebroek.eu/uploads/1/3/0/7/130739101/83e9c77.pdfIn PDF document text
    • http://sitotuk.nicolecroftyoga.com/uploads/1/3/2/6/132681579/80cc8.pdfIn PDF document text
    • http://files.jasonmyerson.com/uploads/1/3/1/6/131606878/d1bf0a20.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/1/0437/7218/2685/files/core_temp_rainmeter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5542/2369/files/sulphuric_acid_safety_data_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/58980871510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4944/7587/files/bistable_multivibrator_using_555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/1987_vw_cabriolet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/adobe_indesign_trial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9534/6590/files/bv_ramana_higher_engineering_mathematics_solutions_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/zagisalirupukutabubuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4498/7292/files/sears_allstate_motorcycle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/gokovukozididugekixijitat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8310/4409/files/golomogador.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6817 5188 bytes
SHA-256: 8080c05222878c3156824ee674b585703113cce66f1219055ebe86457cfc9ad5
font_01_sfnt_off000079a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A2 2604 bytes
SHA-256: 7f7e60d28c7508a493c6893c15c0e19de458bf06e1584b737c93d322ea813cdf
font_02_sfnt_off000084ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84EC 9956 bytes
SHA-256: c6bd13c21e83caba82e8a150e2d087f2d647831c88e611f03f56697b7c462df4

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