Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9734dc09071039…

MALICIOUS

PDF

38.1 KB Created: 2020-08-06 21:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6c9ac71dcdc5b65c800f3203af9c1214 SHA-1: 822617a17118f363521ae71398cb7277a3406b8d SHA-256: 4a9734dc0907103954ac8765cfb0d11c248e6383958dd055290f0065cd141bf1
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a PDF SEO link farm. One of these links, https://ttraff.com/pify?keyword=attributes+in+dbms+pdf, points to a known malicious redirector. The document body is heavily obfuscated and contains remnants of the redirector URL, suggesting the primary purpose is to redirect users to malicious content or facilitate SEO manipulation for malicious purposes.

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.com/pify?keyword=attributes+in+dbms+pdf In PDF document text
    • http://files.childrensbookweek.org/uploads/1/3/1/1/131164474/5281369.pdfIn PDF document text
    • http://files.zepoloptimized.com/uploads/1/3/0/9/130970022/36802ad97f.pdfIn PDF document text
    • http://files.ksuflashathon.com/uploads/1/3/1/4/131407692/194649.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/1/0432/2246/6720/files/durham_county_inmate_population.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/wojulifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/pavotopelalovezopeluzefuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/maxuzelafuligitodad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6413/0710/files/57656028642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/bavemegokoxop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/82780406778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/22615957672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/vuxatowalunajavajipep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/tunazoxuruxalawozeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/lubetetexuwijije.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 2

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_off000059fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59FA 5072 bytes
SHA-256: bf1987886188d1af986ecf115a39e5e934c663a3d607464097bf3e123c0cbe2a
font_01_sfnt_off00006b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1D 9628 bytes
SHA-256: 2116b4eae3b3709048a4a55455c7adb9e0b53c7946efc6fcce1c675e22838490

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