Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d8bfef05a34ce8…

MALICIOUS

PDF

100.3 KB Created: 2020-08-15 08:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5ac3ef94c6c5c976da0c52f4f659ca6 SHA-1: f592cc7a6fabfa45a537f8f9d45be3f12790cd64 SHA-256: f5d8bfef05a34ce8b7b378acf84cb97219d70bf96e1acb49fa3f9af5d177b05b
234 Risk Score

Malware Insights

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

The PDF was flagged for containing links to known malicious redirector infrastructure and a large number of external links, suggesting a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL points to 'ttraff.com', a known redirector, which is likely used to obscure the final malicious destination. The document body contains garbled text but also includes the string 'string. format example java' and a URL that matches the one found in the heuristics, reinforcing the malicious link presence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=string.+format+example+java In PDF document text
    • http://numidur.relentlessperformance.org/uploads/1/3/2/8/132814930/2187371.pdfIn PDF document text
    • http://files.nativitybloomingtonparish.org/uploads/1/3/1/6/131607093/2919008.pdfIn PDF document text
    • http://files.nbyouthvolleyballclub.com/uploads/1/3/1/3/131380569/6983542.pdfIn PDF document text
    • http://files.nanaimobuddhistmeditationgroup.org/uploads/1/3/1/4/131453543/fisonoba_wesosagemesiduz_felilefu.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/1/0434/0409/9735/files/muganimame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0893/3540/files/zaxitolep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/98577322406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/54556870584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/honeywell_pro_5000_install_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/anthology_of_african_american_literature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/rukikev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/bayesian_data_analysis_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2054/8253/files/vugusaranepoxuzu.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_off000143d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D5 5380 bytes
SHA-256: c555f6c31de9a29fc1c5c5d937f9d691967624c2f2ca277828d694885fef0fe3
font_01_sfnt_off0001561f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1561F 14116 bytes
SHA-256: 173fe912eb219dac8b9ad2c52bc87864d50d5eb82510eb168e84414ee65110b5

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