Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96462def1d8cb49…

MALICIOUS

PDF

35.0 KB Created: 2020-09-10 12:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3060b5de3356e6294b0ae547fbf1636a SHA-1: 8e2493bab59fc91604d12911ce131b38f9a7772f SHA-256: c96462def1d8cb49189946394f662f5b3e08558ea88210274397f05b038a1705
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary attack pattern involves luring the user to click on these malicious links.

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.link/pify?keyword=colour+wheel+primary+colours+worksheet In PDF document text
    • http://files.samlyonmusic.com/uploads/1/3/2/6/132681463/9fe278884.pdfIn PDF document text
    • http://files.harvestofpeacemicrogreens.com/uploads/1/3/0/7/130739510/bupororebinizikibu.pdfIn PDF document text
    • http://bigef.untermyergardens.org/uploads/1/3/1/4/131453197/2805276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/d5cf39_8842ee123a744796b006698598a9294b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/35e1ce_0bd6248721d54840a2e518c1368d58d9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2b25b5_6afc7c0774dd4146a13cee07c9dc7d87.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cb2bed_58bb8e70b1894138937188675bfcb7a2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1849a1_724f73e2f108417a98eca708f3e11ea4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/361f4b_26252fa78d6a412088f846794960fd16.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d4df0f_52d45cbc1aed4805b51566577da7b54c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/289c5e_eeefdc3aa29f4aaaa17b009442eae163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/miller_bobcat_225_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/purovekagawepulajepemur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/lelepepuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6676/7013/files/esc_guidelines_af_ablation.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 2

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_off0000492c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x492C 5336 bytes
SHA-256: b95795ca175112ad0244bed3706b8a18f8615e6209191bccbdb595174b10f629
font_01_sfnt_off00005b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B34 10012 bytes
SHA-256: 1cca726f95e246fa269e37857ab8e8c2999b24bceadb4e22e139001af485f005

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