Malicious PDF — malware analysis report

Static analysis result for SHA-256 453943c7fd99bb77…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 03:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9e38c8fa9b12b81078b90b1d680a4310 SHA-1: 1cbece1eada815f425b9bcb721c5c9349a368c4f SHA-256: 453943c7fd99bb7742e88a2de51eca74c10d3ab7df67f11ac854ae1e17fd09ef
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with the primary link directing to a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.com/pify?keyword=refraction+of+light+ncert+pdf as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to malicious content under the guise of a benign topic like 'refraction of light'. No scripts were extracted, and the file type is PDF, indicating a likely phishing or redirection attack.

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=refraction+of+light+ncert+pdf In PDF document text
    • http://fokarewas.ledgewoodhills.net/uploads/1/3/1/4/131411150/fuxis_wosuvefunux.pdfIn PDF document text
    • http://files.irishblessingscoffeehouse.com/uploads/1/3/1/4/131407315/d88c95b500523dd.pdfIn PDF document text
    • http://files.isaksonchiropractic.com/uploads/1/3/1/3/131398195/6582099.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/1/0431/1410/2951/files/58050032928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/chucky_full_movie_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/rotibepej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/nirvana_heart_shaped_box_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6641/6549/files/11635267466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/causes_of_drug_abuse_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/miller_analogy_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/twitter_followers_app_apk.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A2 5244 bytes
SHA-256: 3ae91c95408feea119dd0213caa403e11ec498751e722008d6df4e6bb4581041
font_01_sfnt_off00006b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6B 9884 bytes
SHA-256: e09c896fef2767703d0d5e824f8f3cc86f207981ce3a1a2a6dd81ef3bbe30cf2
font_02_sfnt_off00008d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D72 16144 bytes
SHA-256: 20d7306972e5f804acc0082a46629f259f60cfdea2a9d02db4b080df13e7536c

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