Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea52d1a2a39f926b…

MALICIOUS

PDF

101.5 KB Created: 2020-08-19 20:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aaea7e7c18f3adc5a83bd1cab110144c SHA-1: c09b171bf4084ee551a1f9cf1677565cd25f8a1d SHA-256: ea52d1a2a39f926b743f5eb9a6ea56523c81282c4a79b38a509d85b35715cf19
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm. The embedded URL points to a redirector service that uses keywords from the document body, suggesting a lure to trick users into clicking. The ML classifier also strongly indicated maliciousness. The document body itself contains garbled text but includes the target URL and a reference to 'Amcas applicant guide 2019', likely a lure.

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.cc/pify?keyword=amcas+applicant+guide+2019 In PDF document text
    • http://files.theartfulclarke.com/uploads/1/3/1/4/131407315/nopafun.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/1/0431/2324/5216/files/kuvimojekonugosoduwogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/grammatical_categories_and_word_classes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/fipem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1475/8293/files/57678327641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/sap_basis_documents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1013/files/kapusuzujorowami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6695/files/gimamesediriniwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4569/0266/files/zonajijuwuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/english_bible_niv_free_download.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
🗂 Part of campaign: theartfulclarke.com 4 samples

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_off000146bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BB 5768 bytes
SHA-256: 2f7f60dfabc02dedb37fee2a405ea7e98c9736247ed7543c1c2b141c72dc9136
font_01_sfnt_off00015a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A45 15404 bytes
SHA-256: 6686e578a98bb2c6b114330d05294bb58696c9608102ca563b19da9edb0ab7d9

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