Malicious PDF — malware analysis report

Static analysis result for SHA-256 d525d75172556e65…

MALICIOUS

PDF

50.8 KB Created: 2020-08-09 07:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f563b7ccc7ed280eb2efa0400a6ed19 SHA-1: 2e41613f0b96249558be79804dd38248e06e13ce SHA-256: d525d75172556e650e7d149ec0e7d26efd00d6323b5752753f16ee6a6c549b70
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised as an educational worksheet. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, likely to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=algebraic+fractions+equations+worksheet+pdf In PDF document text
    • http://files.kashmirhouseboatsonline.com/uploads/1/3/1/3/131380875/8474381.pdfIn PDF document text
    • http://files.suffah.in/uploads/1/3/1/3/131380547/1192257.pdfIn PDF document text
    • http://files.goucherstudentartshowcase.com/uploads/1/3/0/7/130775506/tonobikujazina_wurem.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/1/0428/5884/0223/files/68563789047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/norotuvulebokezisukokam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/33214883911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/9373770428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/folukuwevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8761/7436/files/fakuvuduxudilete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/vixejafodikazidaziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/bootres._dll_corrupt_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/25791381169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/40653997516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/rexowonodasubolonajam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/proceso_de_destilacion_por_arrastre_de_vapor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/bezefukitedezusuz.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_off00007f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3F 5828 bytes
SHA-256: 562490dba1295f865d159dacf86e6faba5bb51854a84f47c5f44f82fd8a61554
font_01_sfnt_off0000931b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x931B 14040 bytes
SHA-256: d254ec4b39b96fa5fdd2134ce2cfab5e83538aa04001394302e6224538591695

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