Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d777f265e53daf…

MALICIOUS

PDF

35.3 KB Created: 2020-08-13 23:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e71843485d6f841e226501226b886ae SHA-1: 963d9e33ff6b45fa39c6f6d0ce0477e28fb4e7d1 SHA-256: a3d777f265e53daf21c12fc1d79c59ec3c359c9767464eb834be7ffcd283e304
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=grammar+worksheet+enough+adjectives+vs+nouns', is identified as a malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing.

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=grammar+worksheet+enough+adjectives+vs+nouns In PDF document text
    • http://didezur.schecktech.com/uploads/1/3/0/7/130739678/e350a.pdfIn PDF document text
    • http://kipilomod.stwilliamparishwigan.org/uploads/1/3/1/3/131383548/dorolawarajetus_raziz.pdfIn PDF document text
    • http://xuwale.falconssoftball.com/uploads/1/3/1/4/131411688/ninaveb-puviwubu-werilugepiti.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/1/0433/0009/4112/files/vepufuwak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/9553899261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/dugowibagulatazono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/bizumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1032/5671/files/cnc_machine_tools_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/tofituma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/suwozotajilafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/jebomokosojukako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9125/0590/files/tunukotafudubabekom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/64619077146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/66440727612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/munexe.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 2

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_off00004b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B1D 5644 bytes
SHA-256: 05a0fddfec38ccdb9866095dfac34b5daf3dae06ad2b56b5886024e08ef0dc28
font_01_sfnt_off00005e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4F 9820 bytes
SHA-256: 96e9dc1096904c944794fd69a79b0e9c441876857cb4c65f36c1de7f87fd7967

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