Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac9390d44627f72…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 23:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6aaa0430423697e49b14769117f130a9 SHA-1: e890cb54d81938ca0d1416776e90877a3394d9b1 SHA-256: 7ac9390d44627f72b65003f774236c539a3c3a5063c153d40c84176eeaaa85a4
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting it's part of a phishing or malware distribution scheme. The document body text and embedded links mimic a lure for downloading a question paper, which is a common tactic for social engineering. The presence of a malicious redirector URL indicates an attempt to lead the user to a malicious site 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.com/pify?keyword=air+force+x+group+previous+year+question+paper+pdf+download In PDF document text
    • http://files.wilmington1to1.com/uploads/1/3/1/4/131406518/jipujerek-kazurupuna-juxosofa.pdfIn PDF document text
    • http://venoje.wilmingtonseniorsoftball.net/uploads/1/3/0/8/130874254/tazopikifivufiselof.pdfIn PDF document text
    • http://files.paintcreektaxidermy.net/uploads/1/3/0/9/130969545/zorasuviv.pdfIn PDF document text
    • http://files.stockela.com/uploads/1/3/1/6/131636995/23795661d4.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/1/0436/2603/7411/files/nsk_needle_roller_bearing_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/69016578227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/bible_quiz_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/fiwegox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5545/6149/files/uninstall_java_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/lemomekudorevevikub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1603/6262/files/88448244412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6406/5190/files/55188897568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/58756352069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/exploring_psychology_9th_edition_david_myers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/admonitions_of_ipuwer.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 7

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_off00006749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6749 5760 bytes
SHA-256: fa780b2415c9ab3ef575bc4bdbf738c43320b0bad0e68b0a5d4a1c0dfbeed4d7
font_01_sfnt_off00007b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B13 10156 bytes
SHA-256: 76473e7fdb217ca5bb094b9f8e189b93e08226c750395a3cbab2c4afa85a20e9

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