Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4173d8c1e43e3d5…

MALICIOUS

PDF

50.8 KB Created: 2020-08-01 22:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f7e7e1daa2549eb73364c36c7407a80b SHA-1: 01fe21a7849c8d0f5266f5444cd173ca998ac651 SHA-256: e4173d8c1e43e3d583df58edc939882b373e83dd586ee4ac88ad29d77ab6eb1b
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 PDF files hosted on various domains, suggesting a link farm. One of these links, 'https://ttraff.cc/pify?keyword=rads+to+degrees', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains the malicious URL.

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=rads+to+degrees In PDF document text
    • http://files.smuckerfarmstn.com/uploads/1/3/0/9/130969543/638415c2c.pdfIn PDF document text
    • http://files.countryclubofgreenvalley.org/uploads/1/3/0/7/130776449/bagomewet.pdfIn PDF document text
    • http://files.teachitalian.co.uk/uploads/1/3/0/8/130813054/5549313.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/1/0437/5996/0218/files/89913903416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/rinavumigudijopolinevugav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/desesetizalaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/votogufugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/18869575725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/48223058212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/midixadajejokitulos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/lomimilozimuzos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/karanisozapogogivuvifixi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1A 4968 bytes
SHA-256: 26d7b4c440d422115d70e001b683673bd8f766892616947fc41b994e412e2170
font_01_sfnt_off00007e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E13 13224 bytes
SHA-256: 3db85f6cc533cecf555ac5b44722b5aeb552beda153d1bb07a0abf4754058fb1
font_02_sfnt_off0000a893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA893 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c

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