Malicious PDF — malware analysis report

Static analysis result for SHA-256 66dde27f8c90bc91…

MALICIOUS

PDF

63.3 KB Created: 2020-08-17 04:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: afef15d7d2245d8f086410f6ee8374bf SHA-1: 29fa26abcfc3838205f7f36ed974f7171e5723ba SHA-256: 66dde27f8c90bc91209c8918e50d44aa42c264be358a7ff409e1f89c1219f06b
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector for potentially malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure for an exam date sheet, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including one to a known malicious redirector, supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=hssc+exam+date+sheet+2019 In PDF document text
    • http://files.ebcmasonry.com/uploads/1/3/0/7/130739704/bde55.pdfIn PDF document text
    • http://files.buttonwoodheights.com/uploads/1/3/0/7/130740033/tufojujewudixaf.pdfIn PDF document text
    • http://files.wayne-badminton.com/uploads/1/3/1/3/131384359/9068208.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/59854993546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/68424240574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6915/2163/files/javascript_iterate_over_object.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/bigim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/88756094437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/theory_of_point_estimation_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6666/8694/files/90204736019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54101174921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/complex_numbers_formulas_class_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5114/5626/files/72113012600.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AB 5088 bytes
SHA-256: 2e2470cea0916b512470ab0d2a91241a7e49da6fb7325b1ef2cf0db58b9bfc83
font_01_sfnt_off000074f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F2 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000804d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804D 1936 bytes
SHA-256: 7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a
font_03_sfnt_off00008994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8994 10788 bytes
SHA-256: 0e0e9dc9bc29e73cf6dd550a70a2c6b1852181cb0fe7f440d3b24cc34b91f5c4
font_04_sfnt_off0000aeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB6 16476 bytes
SHA-256: 032413062597e5393dd34b29a3f0a7561840314150b3ef94e38aeb0f1ded41b7
font_05_sfnt_off0000c503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC503 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_06_sfnt_off0000d305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD305 8332 bytes
SHA-256: 48200ec0dfc61dcf1070c2608e7895875c58457ed27a76f2da6b3af13f4cfaf7

Open this report in the interactive analyzer, or submit your own file for analysis.