Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12dd972123662e4…

MALICIOUS

PDF

42.5 KB Created: 2020-07-31 15:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf8e8fcb54460feed8bd2750e3435155 SHA-1: e3ce428af50bd9c158ffe6b53151d8c65b5e1ca8 SHA-256: b12dd972123662e4fe54cca781a32a41759769a61ade4a500367a22d34fd4976
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The primary malicious URL identified is https://ttraff.cc/pify?keyword=klein+organic+chemistry+pdf, which is part of a link farm designed to distribute malicious content. The ML classifier also strongly indicated 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.cc/pify?keyword=klein+organic+chemistry+pdf In PDF document text
    • http://files.907synthetics.com/uploads/1/3/0/7/130775393/1929385.pdfIn PDF document text
    • http://files.haleyscometrun.com/uploads/1/3/2/7/132740821/bumabo.pdfIn PDF document text
    • http://files.daventrydogtrainingclub.com/uploads/1/3/0/8/130873973/6745225.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/1/0431/5460/4198/files/60308641905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1537/9866/files/23982493911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/99931466764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/sepekavojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/12769782446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1026/9085/files/12284354519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/4932888348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1629/7368/files/29197840811.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 8

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_off00006627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 5428 bytes
SHA-256: 3fac72383b81a39c1b7212ba550a6464b2ced0b2a26abbe008023fd938a81bda
font_01_sfnt_off0000787c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787C 10224 bytes
SHA-256: 7ab6e4a84159fb0f5dd77d5ebcb6217cb74073fbab2b7416d156a853100968fe

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