Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bbf2438cd41abf…

MALICIOUS

PDF

46.9 KB Created: 2020-08-06 20:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a18b1f3b6301dbcbb38905ff5ae61e07 SHA-1: c2ff590ba507d45456508c20f28635f478632d31 SHA-256: d8bbf2438cd41abfc853875a05ff449d900a16c4d7c0fabb26906dd14694bbfc
202 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 pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at ttraff.ru. This indicates a link farm or redirection scheme designed to distribute malicious content or phish users. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=articulos+cientificos+pdf+quimica In PDF document text
    • http://files.chriskellylandscapes.com/uploads/1/3/0/7/130775677/dumebabijeroko.pdfIn PDF document text
    • http://files.abs-lao.com/uploads/1/3/1/8/131871909/galapo.pdfIn PDF document text
    • http://files.ukassignments.net/uploads/1/3/1/3/131379420/guvozuletazimixexun.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/1/0437/7496/7965/files/xeledijiweweluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/2488119379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/las_clases_sociales_en_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/46869426399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/alimentao_escolar_saudavel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7313/2961/files/52804866599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/zekiketavilatijafubire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/19664008786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/irithyll_dungeon_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4364/6614/files/types_of_biomedical_waste.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7356/7894/files/14101341554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8045/8144/files/gudotubawenomuzis.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 4

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_off000077d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D2 5416 bytes
SHA-256: 141d8937b21d7ce4e49da52713c191d40aae99b65ab6decc8eac51ba1a0200d4
font_01_sfnt_off00008a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A25 11304 bytes
SHA-256: a8de75da548dc24b1c034e52b5403ffc0f2746390942259af2cef6216e07ce56

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