Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fc0efabf536a6e…

MALICIOUS

PDF

33.0 KB Created: 2020-08-21 07:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7de388450bca037b742c5e77864ea89a SHA-1: c0d207642a4acd560d8d94c0648917afad3ab727 SHA-256: f8fc0efabf536a6e7303c613ec34bda9dfee1cc401566105f9e9295a110feb5f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=memorial+university+library+guides`, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the attack pattern of a link farm designed to redirect users. No scripts were extracted, but the PDF structure and link analysis strongly suggest a malicious redirection scheme.

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/pify?keyword=memorial+university+library+guides In PDF document text
    • http://fikek.douxoverdesign.com/uploads/1/3/2/3/132302868/1856062.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/1/0432/0421/4942/files/toxitojovosubajifufazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/29969487890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/gepotiginivifowetem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/76794881116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/trial_of_the_sea_lion_vanilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/building_blockchain_projects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/nobudab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/religion_of_the_ancient_celts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/55902235299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/nimutasizisobakir.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_off0000450e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x450E 5452 bytes
SHA-256: a59febfe6c5958d92687adb65bfa06f7bdc2f2699a7cad6d1ea966ec87af515f
font_01_sfnt_off0000578a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x578A 9404 bytes
SHA-256: fe5aa5f0c3b0eaad36ae1bfcc211b2360661b6cadd6231873d1d5e65be0c9c91

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