Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9952ba8b15efd69…

MALICIOUS

PDF

33.4 KB Created: 2020-08-25 08:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d8ba4bbf3aafc56965ae919d45ee36a SHA-1: 0a4832093816d88727ccedda0a21d10c5e6ba20a SHA-256: c9952ba8b15efd697b38dd5639b1b186acab9a5bcf2360e55863bf4feabf698c
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to an academic worksheet and the malicious URL, suggesting a lure. The primary malicious URL is https://ttraff.com/pify?keyword=central+tendency+and+dispersion+worksheet, which is likely used to redirect the user to a harmful destination. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing 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=central+tendency+and+dispersion+worksheet In PDF document text
    • http://files.gamecourts.com/uploads/1/3/1/3/131398224/xojabexumamepi.pdfIn PDF document text
    • http://files.smartspraytan.com/uploads/1/3/0/7/130776141/180198.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/1/0430/1278/4277/files/kasozudawelurovipifogugim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/download_buku_siswa_agama_islam_kelas_12_kurikulum_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/jezawoxotop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/bomumugunepapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/10583051081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5628/3296/files/java_swing_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/foketivopoxenosarulufero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6095/2229/files/62058924553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/fun_guided_reading_activities_ks2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/theories_of_language_acquisition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3013/6230/files/levekafoloxilutiziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/35257164462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/ez_go_workhorse.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 3

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_off00004a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A12 5324 bytes
SHA-256: b36e47ff9abf95fb0da0c2c13be144c00bef04552cc83450c3f3e1e7c94fe393
font_01_sfnt_off00005c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C35 8392 bytes
SHA-256: ab13db8c51bc4a4b2b533b127340d321116da3e4745f7b2ed2167b816cbf801a

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