Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1dec41f02e3ac3e…

MALICIOUS

PDF

52.2 KB Created: 2020-08-24 18:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce7ddba92fb5512a637c8caad6173a63 SHA-1: 11d5780bd50e447113ee5fafda2d5f657b20d8c3 SHA-256: b1dec41f02e3ac3ed507605505439458518177ee2d55df7f4565198748637417
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to a 'Curriculum vitae formato europeo 2018' and a URL pointing to a redirector, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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=curriculum+vitae+formato+europeo+2018 In PDF document text
    • http://files.kaixuanengrg.com/uploads/1/3/1/8/131871659/1763368.pdfIn PDF document text
    • http://gifum.medinfodoc.net/uploads/1/3/2/7/132710567/xasusepi.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/1/0435/0060/1504/files/new_york_state_pistol_permit_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8638/0189/files/79076648753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4931/9577/files/kavuxoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1791/9912/files/57135982020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/above_top_secret_timothy_good.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/birkenhead_sixth_form_college_term_dates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/cashless_transaction_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2866/7798/files/iterate_hashmap_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/10504593204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/37158578000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/66123989876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/magazine_template_psd_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/93005058122.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_off0000865c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865C 5468 bytes
SHA-256: 67eb9ee450ea9c460e099bce8f2d3c8962f102d7f608b185234da8bdf34f3f36
font_01_sfnt_off000098e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98E7 12704 bytes
SHA-256: dc96432404fc339445cef2ba77a96b0e8b0309b75c7d727d83644fb1492256e3

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