Malicious PDF — malware analysis report

Static analysis result for SHA-256 c896920f58a2b4ca…

MALICIOUS

PDF

40.3 KB Created: 2020-08-20 02:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c084fde618b065003cab8f57699b254d SHA-1: 271065fbd46d0ac196b8e5d78d1d2d88c048a2da SHA-256: c896920f58a2b4ca0a577be368d1d7cd53522ad4838978fd7c4671756c95f09e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=free+addition+coloring+worksheets+for+2nd+grade`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same redirector URL and several other PDF links, suggesting a lure to external malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=free+addition+coloring+worksheets+for+2nd+grade In PDF document text
    • http://files.constructionandtreeservices.com/uploads/1/3/1/4/131453645/mifoz.pdfIn PDF document text
    • http://files.sanctuaries.org/uploads/1/3/1/8/131856443/jebegesogitesol.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/1/0435/1016/9759/files/bilekakanizojenezinop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9581/7382/files/jaratifulesagamumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9955/3959/files/18349893660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/87819182406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5748/6753/files/ti_84_calculator_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/runigaresuteludaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/lijutosagiwololizoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/36798564503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1650/0886/files/xexeributuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/golesimupifebikoxew.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_off00005eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFF 5528 bytes
SHA-256: 66a8808a6b2d60e75c51078efe4f2b68000ad9126af91ace395f972a37a5e5be
font_01_sfnt_off000071d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D9 9924 bytes
SHA-256: 7f5550b459b7c83ef546991eb93673d310bcab814e15fde9155c7729ecddc2f8

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