Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3d6999a5a3f34e…

MALICIOUS

PDF

33.9 KB Created: 2020-08-23 04:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6209ca72f5f58e320dcbaef76ffb77b5 SHA-1: bfaf1a7c61dbb6b12f226f2d7268effd480aa461 SHA-256: 4b3d6999a5a3f34ed203ba6e3e31536ff531a2c936542aec89b7684cc7041fee
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary malicious redirector identified as ttraff.ru. This suggests a link farm or redirection scheme designed to obscure the ultimate destination of the malicious payload. The document body contains text that appears to be search engine optimized keywords, further supporting the link farm hypothesis.

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=mera+badshah+hussain+hai+mp4 In PDF document text
    • http://dowelaxa.howellcrossroads.com/uploads/1/3/0/8/130814017/9325564.pdfIn PDF document text
    • http://zewamug.coloradospringsspaandsalon.com/uploads/1/3/0/9/130969723/4265142.pdfIn PDF document text
    • http://kodafoful.elportalschoolptg.com/uploads/1/3/1/6/131606666/3302135.pdfIn PDF document text
    • http://gibezimaf.formchiro.com/uploads/1/3/0/8/130873982/960347.pdfIn PDF document text
    • http://files.ashleyharrisonsmith.com/uploads/1/3/1/6/131636642/22953e860b66.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/1/0434/1553/5774/files/8_month_baby_food_chart_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5464/4894/files/lelejeturematowem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/silupozodanodadiziwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/mopemesadojototusojatus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/nutozavapibesafavuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4294/4677/files/18429324950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/16714672212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/80864474477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/lapakasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55079075607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/82534690885.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 6

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_off00004753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4753 5400 bytes
SHA-256: 7ad02935667f871587c6fcfe356be586e4ab9767f145616123d6ce54c9e5e323
font_01_sfnt_off00005985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5985 9780 bytes
SHA-256: a16445cdda5b7563e79ce1003b75288d066e6365f0a415798a4e2950f8b0f3d6

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