Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a1c35fb7bade37…

MALICIOUS

PDF

61.2 KB Created: 2020-08-05 03:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 47ca7764d5de29a167bc08df6e8f3c5f SHA-1: 3a4f84a9106b65950d2e1084393211ef27383e2d SHA-256: 18a1c35fb7bade37eb0a600ea790795d47c73193a1ed10ca28fdb287d86cdb85
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, which is flagged as malicious. This indicates an attempt to direct the user to a malicious website, likely for phishing or malware distribution. The presence of a link farm heuristic further suggests this document is part of a larger SEO-poisoning or spam campaign.

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.ru/pify?keyword=the+ascended+masters+light+the+way+pdf In PDF document text
    • http://files.fioga.org/uploads/1/3/1/6/131606617/tegedubu_nasasanepomub.pdfIn PDF document text
    • http://files.mosholudaycamp.com/uploads/1/3/0/9/130969312/bcfaed50065.pdfIn PDF document text
    • http://files.brantfordtrackandfieldclub.com/uploads/1/3/1/4/131407152/4553063.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/1/0437/2388/2664/files/48772536602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/95923314969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2529/1671/files/9397867250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/bojedosejufozuwus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/sadabok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/hp_officejet_5740_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/rujozosijamoseti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/lawawotugag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/43707342929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/mebomunesewalaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/80570155439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/95169676592.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 8

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_off0000b119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB119 5712 bytes
SHA-256: 5a83c7592f92aa95e8b1983f87a1f9418dcc788b0bb26717471bf4513ca7e42c
font_01_sfnt_off0000c470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC470 10272 bytes
SHA-256: 87e3494acf7639ddac7cc2f2627d0d73d7d09f7b644bf1de485517cb433d0619

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