Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ccf27187b5dc2a…

MALICIOUS

PDF

60.7 KB Created: 2020-08-09 17:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2d0aed8e9f021bbdac82ff0f7e7062ba SHA-1: ac793967aeae2e8411094b4e6939617f06c5aae1 SHA-256: e5ccf27187b5dc2a0a468b6bdb40e508c6a154218f1d2bf5e3d4fe4c7f38d514
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 malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL points to a redirector service, which is a common technique for distributing malware or conducting phishing attacks. The document body, though heavily obfuscated, contains the same suspicious URL.

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=sat+1+biology+book+pdf In PDF document text
    • http://files.churchofstcolman.org/uploads/1/3/0/7/130776168/e66ac2.pdfIn PDF document text
    • http://files.rgengineers.com/uploads/1/3/1/3/131380598/9093235.pdfIn PDF document text
    • http://files.scottcountyfasttrack.com/uploads/1/3/2/6/132681378/7730934.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/1/0430/5358/0439/files/bruchrechnen_aufgaben_5._klasse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6187/7663/files/ethnic_groups_in_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/vefoxisumupujobopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/jejowolajixavoduxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/kevodosol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/patofisiologi_jantung_koroner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/jonodefazuparemabanuxuvod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/49843924598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0682/7429/files/shielded_metal_arc_welding_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8276/6743/files/anatomy_book_for_bams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/catena_de_la_legion_de_maria.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_off0000ae25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE25 5396 bytes
SHA-256: 78bdd805a934af8affd53e030eed34276b2a5fc56c799893c0aa2cb833c7bdf0
font_01_sfnt_off0000c0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A4 11072 bytes
SHA-256: 838c6d0416824c4ee6c07369696f3bc4d9c43cb9aca0a9c5c2613935c28dae49

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