Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1402780b5eb296f…

MALICIOUS

PDF

40.3 KB Created: 2020-08-12 18:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 772dc8d9dec11cfca4d52c1ca8a75bb7 SHA-1: 5293a40ccc038016a8d4aa0d0782e9ab76e33c0c SHA-256: c1402780b5eb296f177187a26cdaeade11701b6befc9f8beb814f37da5fcbc95
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to a known malicious redirector service. The document body itself is heavily obfuscated but contains the same redirector URL. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious links broadly. The primary malicious URL identified is https://ttraff.com/pify?keyword=carcinoma+epidermoide+boca+pdf.

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=carcinoma+epidermoide+boca+pdf In PDF document text
    • http://difikego.hizercustomdesigns.com/uploads/1/3/0/8/130814328/zikekatisobo.pdfIn PDF document text
    • http://files.daviessurveys.com/uploads/1/3/0/9/130969431/mofaribexaposetoj.pdfIn PDF document text
    • http://files.medaryville.net/uploads/1/3/1/8/131856232/fisibesirejozazo.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/1/0432/7201/1941/files/bhagavad_gita_chapter_15_slokas_in_sanskrit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/accidental_inventions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8061/4041/files/bible_timeline_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1400/2600/files/vufaxazevulutegojipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/73541759803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/nasuroge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/79715082172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/21300892183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/negifezekokimugotirajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/29372292301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/edit_pdf_add_pages_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/73719151724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/73665072360.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_off00005efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFA 5136 bytes
SHA-256: 4dcf51a041996107fbed0f25f96779ac254715523247971d85479e47d0271028
font_01_sfnt_off00007050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7050 10648 bytes
SHA-256: 5c6f18512d3f17384c9c846bcb65e6fb97cc7449e30fab7d9d201129da4a7551

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