Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b15d0e1753b9e20…

MALICIOUS

PDF

45.7 KB Created: 2020-08-12 17:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 159fbdbe430ff7c6a06d00299506b54d SHA-1: 162dbded3239abb4b69c9fdad3d4db3579860a11 SHA-256: 8b15d0e1753b9e20f04e9ff77ae4a16a48facbd8bc681cde95f2638d4daa2b53
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body itself is heavily obfuscated but appears to contain references to the redirector URL and other PDF files hosted on Shopify. This suggests the file is part of an SEO link farm designed to lure users to malicious sites.

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=manual+de+cooperativismo+y+econom%25C3%25ADa+solidaria+pdf In PDF document text
    • http://files.thestorystudiohk.com/uploads/1/3/1/1/131163635/tixefe_pejetadoxap.pdfIn PDF document text
    • http://wixafanop.brewsterranchandtack.com/uploads/1/3/1/0/131069934/84640327484d26c.pdfIn PDF document text
    • http://files.shangrilavintage.com/uploads/1/3/1/1/131164425/wufikavom.pdfIn PDF document text
    • http://lokuwij.carsandcrochet.com/uploads/1/3/1/0/131070314/fofimoserixufa-bunipanib-fuburebuneko.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/1/0430/5390/8117/files/68420946984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/muxalodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/rafigadosisupanuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/jquery_post_with_payload.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sotuxinonuwirumedubisaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/japurogoditema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/xezakizigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/rikabesevuwat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9413/7249/files/bukhari_shareef_hadees_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/numpy_random_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/94981619704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/20433454383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3073/1173/files/atex_hazardous_area_classification.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
🗂 Part of campaign: thestorystudiohk.com 3 samples

Related samples 3

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_off00006f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 5524 bytes
SHA-256: 7ee4c77ec3900d6a92b3f8297431d260dc3ed88fa0f9131c69698bae7edce693
font_01_sfnt_off000081fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FD 11188 bytes
SHA-256: 93d2e7abb2b035d54fb7b239ce431222c4165c60a2007bf8361b864d3cedaeac

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