Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d52a3fa0be8a439…

MALICIOUS

PDF

47.4 KB Created: 2020-08-03 17:39:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db357623b1af88550839456fe853a507 SHA-1: 159b4857f536721554475006dd95424c6f464de8 SHA-256: 7d52a3fa0be8a4396909e738dbe777403d48a6e9e3e85e00a9896a07834f3974
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to a redirector service, which in turn points to a link farm of other PDFs hosted on Shopify. The primary redirector URL is `https://ttraff.ru/pify?keyword=c%25C3%25A1ch+chuy%25E1%25BB%2583n+t%25E1%25BB%25AB+pdf+sang+%25E1%25BA%25A3nh`. The document body, though heavily obfuscated, contains similar text and URLs, suggesting a lure to download further content. The ML classifier strongly indicates maliciousness.

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=c%25C3%25A1ch+chuy%25E1%25BB%2583n+t%25E1%25BB%25AB+pdf+sang+%25E1%25BA%25A3nh In PDF document text
    • http://files.eic-llc.com/uploads/1/3/0/7/130739779/405aa7a75ae2.pdfIn PDF document text
    • http://files.essiacnorthwest.com/uploads/1/3/1/8/131871439/jenizo.pdfIn PDF document text
    • http://files.kuwaitotasom.com/uploads/1/3/0/8/130874204/povasano.pdfIn PDF document text
    • http://files.prettyandpinned.com/uploads/1/3/1/6/131607163/8718422.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/pajotoliwafugesekediriw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/sixiselikofitodudizuribiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/66550728786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/39918500305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/89008141953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/tigatulani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/rafapeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/kofakukegirajuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/zogetuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/17665589030.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_off0000564b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x564B 6164 bytes
SHA-256: 213a6adc1f3ffe43abe4f4feb4eec139e4a3785247d9e4a95fea05387253bcfa
font_01_sfnt_off000069d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D8 21592 bytes
SHA-256: c99ac0d790194d95e9a315817ccce009064f4c33b15e70c86566347f8d915953
font_02_sfnt_off00009876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9876 16684 bytes
SHA-256: 012369ce243b965708c42a3186be625a70f140daa5003760912f7a5213c86928

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