Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7d5c5e591c0127…

MALICIOUS

PDF

40.2 KB Created: 2020-08-15 02:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9a6eef2aad7ee1992e356120ec8238bf SHA-1: 45087efdf544420545a30c97ea0dd19154f74124 SHA-256: fd7d5c5e591c01278e39d4a143071b11c46ed9496dd747046133598cbf8b4780
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector to ttraff.cc, indicating a link farm or phishing lure. The document body, though malformed, contains the text 'Wiskunde basisvaardigheden pdf' and the URL, suggesting a social engineering pretext to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=wiskunde%20basisvaardigheden%20pdf In PDF document text
    • http://files.thevictualbar.com/uploads/1/3/1/3/131383771/bujenab_tavuzur.pdfIn PDF document text
    • http://files.tindelltraining.com/uploads/1/3/2/6/132695258/neluweradomo.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/1/0431/9418/7933/files/40936464306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/88969779520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/fikuzazirot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/jawesadiratibopibulutafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3216/6824/files/pugunewosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/89358424046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/mupero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/jobewewavenifagubemaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/fitubukigotijuzapim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/vigumopiwesilebiben.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_off00005d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 5548 bytes
SHA-256: 57be5497d350ca2772899405091e39d9f054a4924d0ad361ec336e69630584ef
font_01_sfnt_off0000704e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704E 10612 bytes
SHA-256: 73dc03160e68d89fd87efa4917a701b228bd876b33441120867701e5112fdfa4

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