Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4c50e6e9959abc…

MALICIOUS

PDF

51.9 KB Created: 2020-08-14 19:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6bf29d8ae8a1181ce23ac86d06f47930 SHA-1: 4fffa0c1bb250ded7f7bf10f67e5ef62c32e0fe0 SHA-256: ac4c50e6e9959abc867bd0076128f8831cd6537fbc619bd399d32aed97b86ed3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to an academic exercise and includes the primary malicious URL. The file's structure and embedded links suggest a phishing or redirection attempt to malicious infrastructure.

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=exercice+transformation+chimique+ou+physique+5eme In PDF document text
    • http://files.whizmeal.org/uploads/1/3/0/7/130739369/f30037cba12.pdfIn PDF document text
    • http://files.economicsuniverse.com/uploads/1/3/0/8/130874594/442dc7863.pdfIn PDF document text
    • http://witaki.melissasugarman.com/uploads/1/3/1/4/131454065/3404020.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/1/0433/4383/9385/files/25962968309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2426/1018/files/92128341201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/rukaxosafazosapilazafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/lewojepidozimobegut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2313/files/tibikifirinajikakudas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/15240526362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/94331517666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/vakez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/lysistrata_jeffrey_henderson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4455/9258/files/rya_book_bank_application_form_2020.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 5

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_off000087e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E2 5600 bytes
SHA-256: f1fdd2e3f20508f8c75cc9a1820f38048bbff39ec51b8a4729332fcfcf8e0ab7
font_01_sfnt_off00009ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD7 12148 bytes
SHA-256: 38c09146266efe649cde174c3f8635a382b91bcfd169b40bfb7c22f7577a0fc7

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