Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1cb0f5e28b03ca…

MALICIOUS

PDF

47.1 KB Created: 2020-08-01 14:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9831f28b60ebced32162a51422f57ae3 SHA-1: e0805d8813d1444c9be3a3fbea61b18d8c9c81a9 SHA-256: cf1cb0f5e28b03ca0cb3ef8bba36f03b2f73009caca4edbc3e99b2253462471c
194 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a "free registry repair" tool, which redirects to a malicious URL (ttraff.cc). This indicates a phishing or social engineering attack aimed at tricking the user into visiting a potentially harmful site. The PDF also hosts a large number of other PDF files, suggesting a link farm or SEO poisoning attempt to improve search engine ranking for 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.cc/pify?keyword=free+registry+repair In PDF document text
    • http://files.marinerscoveneighborhood.com/uploads/1/3/1/3/131379730/lepajifotag-foburad-tanosarodeso-tivetetikisa.pdfIn PDF document text
    • http://files.tbps-tw.org/uploads/1/3/0/9/130969768/91d73a35ab856b.pdfIn PDF document text
    • http://files.chinatowntang.com/uploads/1/3/1/0/131069781/9269522.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/1/0433/7824/5781/files/22305679039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/fanujodimegesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/mafusiwufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/mipofupegavubizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mitev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/27549932981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/44319678015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5992/7448/files/pugifaxuketozevojulitavuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3184/5271/files/history_of_kashmiri_pandits_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/kekejitafojijisane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4352/0665/files/62136881289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/ropilijegudolid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/9247291489.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 1

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_off00007a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1A 5012 bytes
SHA-256: 5287fdf8a5b874dbaca459b22fc2d5dc3cd7c559500603d3fb39ab007171db49
font_01_sfnt_off00008b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B48 10764 bytes
SHA-256: 8f6724d8e2a865692d5109e018fb9fa2a867a1607dc51c882b6185f9960d26e1

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