Malicious PDF — malware analysis report

Static analysis result for SHA-256 55399574c8484633…

MALICIOUS

PDF

45.1 KB Created: 2020-09-10 06:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44318d324245b9b7098a79619a11bfa0 SHA-1: 2466323b0a47a609662d34c7939ee962110d6a58 SHA-256: 55399574c8484633960aa41f17edb5913e5d7c06fc5e88022d06f65f5ef66e9a
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.link/wix?keyword=jk+master+slave+flip+flop+datasheet', is flagged as a malicious redirector. The document body contains garbled text but includes the same keyword as the redirector URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential SEO manipulation or content distribution scheme, possibly to host further malicious payloads or phishing pages.

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.link/wix?keyword=jk+master+slave+flip+flop+datasheet In PDF document text
    • http://files.johnnyomusic.net/uploads/1/3/1/4/131437775/e675ec8.pdfIn PDF document text
    • http://files.mswilliamsteachesfourth.com/uploads/1/3/1/0/131069934/jekubokazexabosevox.pdfIn PDF document text
    • http://files.burnsplanning.com.au/uploads/1/3/2/6/132695519/pugutuwakidemabovabi.pdfIn PDF document text
    • http://files.spotsycofchrist.com/uploads/1/3/1/4/131437074/putosu_jiwalugubevadi.pdfIn PDF document text
    • http://files.richmondshiremusicschool.com/uploads/1/3/1/8/131856331/516ac1eea.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/1/0434/2707/0119/files/gowenirirogopano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0598/4158/files/24251497621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/43924790331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/2478955753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/51971049956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0761/1804/files/hp_12c_manual.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 6

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_off00006604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6604 5392 bytes
SHA-256: af45063a2c4856b69814fefb54f7e3083ebec5a0df8e3c2519f656ae7e87a80d
font_01_sfnt_off0000783a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783A 15256 bytes
SHA-256: 71edded00dacfe3da55f807baae19b2d0aca2654c836efc5401c53dd0d433fd8

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