Malicious PDF — malware analysis report

Static analysis result for SHA-256 775bb8d348237e56…

MALICIOUS

PDF

36.6 KB Created: 2020-08-05 15:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8313836410887fef9ca0240519283915 SHA-1: 0b29d487313ea1c59d06ea381df305903be066d9 SHA-256: 775bb8d348237e5610df7ccc78d81c4a65163436428f427cb965dfc16d419849
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or malware distribution attempt. The document body, though obfuscated, contains the primary redirector URL and references to other PDF files, suggesting it's designed to lead users to malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=physical+science+p1+november+2020+memo+grade+11+pdf In PDF document text
    • http://files.curbcompost.org/uploads/1/3/1/6/131606127/8100798.pdfIn PDF document text
    • http://files.jurneyvetneuro.com/uploads/1/3/1/3/131383838/vifiwagiz_disesodubux.pdfIn PDF document text
    • http://files.rachelpagesings.com/uploads/1/3/1/3/131398194/9f32379d8a309.pdfIn PDF document text
    • http://files.oasisdogspa.com/uploads/1/3/0/9/130969993/1827afb1254bc1.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/1/0432/6454/0840/files/94370373421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/49414895672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/ralevuvokasowejonizoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/xigidedukafoxodigepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/55443603508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/autonics_pr12_4dn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4985/6669/files/emergency_banking_act_march_9_1933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/42850837173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/cube_world_real_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/adb_list_installed_apps.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 6

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_off00004e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E11 6196 bytes
SHA-256: c27e02d3f04b7473c43f401e02271ad9fb7c4e76e3cf66e92984891c8c7aeef7
font_01_sfnt_off00006312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 9924 bytes
SHA-256: f3573d0263211c180621c910119eccfd4ed58bfc3d5a47d421688120295e1f82

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