Malicious PDF — malware analysis report

Static analysis result for SHA-256 419515b1da3aa05a…

MALICIOUS

PDF

38.5 KB Created: 2020-08-10 16:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 661e2a9123cd38e20d06f552080288d0 SHA-1: 3b002436892540404c4ab44fe02097195662374d SHA-256: 419515b1da3aa05ac074eaa27c3ca70690b18d9a4f955c7ce5c05d8825c3d4cd
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a link farm detected by heuristics. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which likely serves as the initial stage for delivering a malicious payload. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=funcion+exocrina+del+pancreas+pdf', suggesting a lure related to a pancreas function document.

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=funcion+exocrina+del+pancreas+pdf In PDF document text
    • http://files.keanoraubun.com/uploads/1/3/1/6/131637014/pepelumerif.pdfIn PDF document text
    • http://files.instantcleaningservice.com/uploads/1/3/0/8/130874582/4811756.pdfIn PDF document text
    • http://files.ericgamalinda.com/uploads/1/3/0/8/130874284/wagamekamizili-tumukibu-rafufebuj-wotan.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/1/0433/0687/7080/files/kevimofurerofujasopam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/24972796391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/66852076270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/pumis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4492/9690/files/31571318202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5553/8591/files/joint_commission_international_accreditation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2792/2076/files/78970020498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/95012896833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/78148284940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/10653222920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6225/3982/files/academic_writing_task_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/adobe_photoshop_cc_2020_full_tutorial.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_off0000595e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x595E 5172 bytes
SHA-256: b2c03c9b2c1f30da3a7292d61f76254b3556a963d66273b2ca4c5688740dfb5f
font_01_sfnt_off00006b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 10048 bytes
SHA-256: 6bb6816da9d5be468ea3506288ee989faf66c24e7a0b0b515bdeab725fd5745e

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