Malicious PDF — malware analysis report

Static analysis result for SHA-256 618b1d6ebbae5809…

MALICIOUS

PDF

40.6 KB Created: 2020-08-07 01:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e212ff3c566fa964318035147626c84 SHA-1: bbdd28376b794fa063a4a6ae4e9725219d7afbaf SHA-256: 618b1d6ebbae58091205bc1f3aede011815d535b9ade5818deaaa0fcefd583de
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to improve search engine rankings. One of the primary links directs to a malicious redirector, suggesting an attempt to lead the user to 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=abraham+maslow+biography+pdf In PDF document text
    • http://files.voiceschamberchoir.org/uploads/1/3/1/3/131398366/7352071.pdfIn PDF document text
    • http://files.moanxiety.com/uploads/1/3/1/4/131455198/9706219.pdfIn PDF document text
    • http://ralop.streamcamp.org/uploads/1/3/2/7/132710621/c74619cac2037.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/1/0431/5804/4826/files/53093109458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4346/3074/files/15230421944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/melefajeledaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/250024434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/gusujemokifawaxediv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7219/8558/files/18868434004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/thai_horror_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/rizimemesififewotom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/zemagisivawurolodoxob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3282/7288/files/negative_brche_aufgaben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/55080210499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/motejoxefuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/dobezesudiwagapezeno.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_off00006052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6052 5776 bytes
SHA-256: f9647df0c207b0e5821900a8a344c7ceb2a2ce8b2dfd415147286b9a7af27eef
font_01_sfnt_off000073e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E9 9992 bytes
SHA-256: 1af3c252fd6e610ffa81d39781b7e2056ba576b9db3b5ee9e4b38e5ca750b739

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