Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35b4cf13a033113…

MALICIOUS

PDF

50.0 KB Created: 2020-07-31 12:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 883d1d4d7a72bf606f6f4cfbfdfdd7d0 SHA-1: 6f0d477ccbaf169db4a837837b4157c4df90da41 SHA-256: c35b4cf13a033113425717e8ee6bff58d098cd71e10317f5271bde86063d4b73
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. The primary link points to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains metadata related to PDF generation, and the file type is PDF. No scripts were extracted, but the presence of numerous external links and a malicious redirector strongly indicates a phishing or redirection attack.

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=blower+s+daughter+piano+pdf In PDF document text
    • http://files.pelfranchise.com/uploads/1/3/2/6/132695651/duxedugim.pdfIn PDF document text
    • http://files.annkellettghostwriting.com/uploads/1/3/1/1/131163643/e840ad5a0bf396.pdfIn PDF document text
    • http://files.npsarea12.com/uploads/1/3/1/3/131382955/rimuwezus.pdfIn PDF document text
    • http://files.oa-involve-agewell.ca/uploads/1/3/2/8/132814898/wurofojuzidati-katesemogaxute-kesibiri.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/1/0433/0792/5654/files/2907609080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2783/9641/files/31039822517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/paxogazemetovekikolidiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4496/1436/files/xijupexizowazedeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3008/4760/files/6323836830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunirisolifugonogebivaxez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/polegut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/biwijesisuzufugusojewolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/29707732546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7316/5725/files/21630398015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/toregapozosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/67439019709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5293/3018/files/86083028623.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_off00008640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8640 5324 bytes
SHA-256: 6f913c3d85d1952c5506973ef46180b1d784b04cddd3ffd849a7f512ed9c9f76
font_01_sfnt_off0000986d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986D 10128 bytes
SHA-256: 720b8c3d064c55de6578747aed48deaf70dfac2146512b9c7e986f2389988bea

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