Malicious PDF — malware analysis report

Static analysis result for SHA-256 43744c317415c888…

MALICIOUS

PDF

41.8 KB Created: 2020-08-07 06:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e058a7a458d99713f625372ae3c34a3 SHA-1: 425b361c1faef2a5ad201879df5e11fac979f1d8 SHA-256: 43744c317415c8882d43cd55556a1fa19cb7a7bfac561a80be937de0ebbfe71d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'Cambridge fce test practice pdf', suggesting a lure to trick users into clicking the malicious links. The presence of numerous PDF links, many pointing to Shopify domains, indicates a link farm strategy to improve search engine ranking and distribute malicious content.

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=cambridge+fce+test+practice+pdf In PDF document text
    • http://files.powerhouseyouthcenters.com/uploads/1/3/1/4/131437194/484efd0.pdfIn PDF document text
    • http://files.fruitscompassion.com/uploads/1/3/0/7/130775978/2218745.pdfIn PDF document text
    • http://files.oztriathlete.com/uploads/1/3/0/8/130815381/0c13b35d3bbfa4.pdfIn PDF document text
    • http://files.allaurensamanthaforbes.com/uploads/1/3/0/7/130738725/momuposofojejo.pdfIn PDF document text
    • http://files.customcellardesign.com/uploads/1/3/1/1/131164308/goxevifawogiluz.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/1/0429/5337/5897/files/xoxikanijepiludiliravudum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/icecream_split_merge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0490/files/pikekusulefozebeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0509/1745/files/xiresorabuxetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/23536392952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4216/7194/files/93537152160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/ecological_engineering_principles_and_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/9982299781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9168/1699/files/fuzulivazagajel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/epidemiologia_basica_bonita_espaol.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_off00006377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6377 5488 bytes
SHA-256: c6649107287666fd0f20cfd20f3add5e801cb921a5c924be6c2249bb4aa47ad6
font_01_sfnt_off00007602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7602 10672 bytes
SHA-256: ad1c5e40143faaf95d60bd9981b4f86a5a7e1af08a558ba0d624b51e90266615

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