Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18d9ed4bfc84a9b…

MALICIOUS

PDF

38.4 KB Created: 2020-08-19 17:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8eaa7848c3dc1542b2f2551f70b3d051 SHA-1: aa3e2743f8c5917f294ee25bb8e4bb081207a27b SHA-256: f18d9ed4bfc84a9b22d9a941036dff91f6f0fde9f1396550d8a42e7e0188bc04
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to Shopify domains, but the primary link redirects to a malicious URL. This indicates a link farm or SEO poisoning attack designed to lure users to malicious infrastructure under the guise of providing free educational materials. The primary malicious URL is https://ttraff.com/pify?keyword=preschool+math+worksheets+pdf+free, which is likely used to redirect users to a phishing or malware distribution site.

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=preschool+math+worksheets+pdf+free In PDF document text
    • http://files.deannalorenphotography.com/uploads/1/3/1/0/131070476/4408913.pdfIn PDF document text
    • http://files.blacksheepsalonfl.com/uploads/1/3/1/4/131437633/kufiwetulirisesajok.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/1/0437/8794/4094/files/fonuxubexazilamarafunew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1783/7480/files/cd_burner_gratis_italiano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/50805212345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3196/0469/files/add_and_subtract_fractions_with_unlike_denominators_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/zubasujojasofofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/lugejewexawibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/rovufuvepejogadolotemuzim.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 6

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_off00005764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5764 5552 bytes
SHA-256: ce29e8652858d4b2bd1231de4359f49f857f22f3863c66682bc59a07e477273b
font_01_sfnt_off00006a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 10304 bytes
SHA-256: 07a9913d71887adde3237eeebb0f9b37b0efbe36422d90cbf912f8fa1a3ea0c9

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