Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f75fedfbe87984e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 19:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 63d2c8ab92360a146459bf58d01de655 SHA-1: 9107af8a79d339915bb21ce67a4d8c4b8942c4e5 SHA-256: 7f75fedfbe87984e0cbbbcabbe209863b4202ccd544af8b8751cb0174425b18f
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, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Microsoft SQL Server 2016 Developer'. The ML classifier and critical heuristics strongly indicate malicious intent, likely to redirect users to malicious infrastructure or download further payloads.

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=microsoft+sql+server+2016+developer In PDF document text
    • http://files.jacquelynjbenson.com/uploads/1/3/0/7/130739313/gepunejedogonufigu.pdfIn PDF document text
    • http://files.danishquapoor.com/uploads/1/3/1/3/131383760/jilurofidimenisiki.pdfIn PDF document text
    • http://gesejuzo.delphimalamutes.com/uploads/1/3/2/3/132302780/gasofekusisa-rifebediru.pdfIn PDF document text
    • http://files.parttimewanderlust.com/uploads/1/3/0/8/130874257/bfa27f72cb.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/1/0435/8379/9459/files/columbia_river_walleye_fishing_report_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/hybridization_of_orbitals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1825/9365/files/stick_figure_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/airfix_model_world_june_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/95380581673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/tofapivevukuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8062/0963/files/45187124318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/41226082523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/287613023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7084/0981/files/length_conversion_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8708/5222/files/body_systems_and_functions.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 1

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_off000060bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5608 bytes
SHA-256: 565d5c3e1bc8d40e5af975df9b58d17d88d665c364af289c295f7d5f76f1179d
font_01_sfnt_off000073ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 9928 bytes
SHA-256: 771bfea3451d1bbf6582c0f7cb81480d099f243e36066b9c439f41069c53efa8

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