Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c1e75ed8c3e46a…

MALICIOUS

PDF

44.3 KB Created: 2020-08-12 21:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1bebcb90869708861d3287e30909b897 SHA-1: f1798b5f298910df776f5ff73ad37c4de1556d08 SHA-256: d4c1e75ed8c3e46a7a24b5147263675eebd5db3a4f4c220d98021a876c71f81a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=calligraphy+font+styles+pdf', suggesting a lure related to calligraphy fonts. The ML classifier strongly supports the malicious nature of this 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.ru/pify?keyword=calligraphy+font+styles+pdf In PDF document text
    • http://vekazam.dancedynamicsjohnstown.com/uploads/1/3/1/3/131381428/8fda7babf01.pdfIn PDF document text
    • http://dinize.jusrydetrackclub.com/uploads/1/3/1/0/131070374/bemolugo.pdfIn PDF document text
    • http://files.lifelinegospelministries.org/uploads/1/3/0/7/130739678/731b6a9f3fe02a.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/62374455636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/fevax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/viwaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0138/7936/files/84365302496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/baxopujegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6525/2771/files/kidou_keisatsu_patlabor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4929/files/dunexugura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/rijakonixaxulaluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/nosiz.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 6

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5239 5308 bytes
SHA-256: d02fa9fcaf76307e31b35c0c87446fa2226091786691974301afa130586610cf
font_01_sfnt_off00006446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 1736 bytes
SHA-256: 0b66d13572c16216d1273e4871072dad06fd730c1f3137f8a84f1aad35b20d90
font_02_sfnt_off00006ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE9 9688 bytes
SHA-256: c0774a75098d1670c1bbf4cc562190ff7a0d174f4b69191077f6ccecf1ee665a
font_03_sfnt_off00008e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6B 16192 bytes
SHA-256: 75499cce6ae774eb1ed11ef55a8e4af94387e50334f2f733f224f7d1a8712777

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