Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a66a7b723c087eb…

MALICIOUS

PDF

42.6 KB Created: 2020-08-02 18:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2cf9e83c328d57b4497c4b0072f4adf5 SHA-1: c9956d97871a95aa4f3594f50103ad57cd1a454c SHA-256: 7a66a7b723c087eb730c94caa223a431095ae783f60414c51251df27028225e4
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to a redirector service known for hosting malicious content. The primary lure appears to be a fake download for "AP Computer Science 2016 Free Response" materials, which directs users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt to deliver a secondary payload.

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=ap+computer+science+2016+free+response In PDF document text
    • http://files.scottwbrooks.com/uploads/1/3/0/7/130740221/furukapibe-zuvip.pdfIn PDF document text
    • http://files.visionsofadventure.com/uploads/1/3/0/9/130969761/nutusesidobubenono.pdfIn PDF document text
    • http://files.centenarylittleathletics.com/uploads/1/3/2/7/132740665/sasumunuxa.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/1/0429/8525/9159/files/tixowujenifuvil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/border_shadow_css.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5652/9557/files/tifumurasirapuwibobawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5203/9328/files/46070422853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/92357530839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/84873615522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/31130664296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2258/1923/files/bufekubilogiwaweliluwaxak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/free_download_of_rapid_sql_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/46030285280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8958/2487/files/edit_current_website_bookmarklet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/81298202232.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 4

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_off00005ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDF 5388 bytes
SHA-256: fc6bffad419ce002b72c796bc7095dc347bcd66b0b0c6dab54f307e7940e2441
font_01_sfnt_off0000702b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702B 14192 bytes
SHA-256: 53b1613381b89f5a7ad1cf6211a0315be8e10ecc8d602e34341c8605ad2bcd9d

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