Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c851d0b40baca4…

MALICIOUS

PDF

44.6 KB Created: 2020-08-10 09:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f605514175188a389a1d3315fa71d61 SHA-1: f310f1f2552de1b3d6f46c77ec1f2dd5ef9d31a8 SHA-256: c6c851d0b40baca4e39f92afb057273530fe3c86348345c47247215bd1042ff4
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, many of which point to a redirector service. The primary heuristic indicates a malicious redirector link, suggesting the document's purpose is to direct users to harmful content. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, indicating a lure to a potentially malicious site.

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=cristianismo+puro+e+simples+download+pdf In PDF document text
    • http://files.triangleyouthballet.org/uploads/1/3/1/8/131856877/napigajulig.pdfIn PDF document text
    • http://sozepa.zicklinfaa.com/uploads/1/3/1/3/131383664/jowop.pdfIn PDF document text
    • http://nukowon.alexsarkisian.com/uploads/1/3/1/6/131606727/fesigakeluje.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/1/0430/5318/7223/files/ilustracion_cientifica_botanica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3216/7068/files/12698196573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/mijubafafifeserovarol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/jinob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/17052855064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8250/4600/files/spoken_english_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9322/0766/files/goniferunonako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/30996924592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/12787783906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7480/4126/files/90197625268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0327/9517/files/29827224769.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C40 5184 bytes
SHA-256: a32bc3ed6deed8184f5cdb16ce219d346018f8883c5fd452b32e91e0d0398401
font_01_sfnt_off00006dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD7 10120 bytes
SHA-256: fda63367318d76abe2c813752c26c39b0e5b6aff393c6ba3658baba8906c378d
font_02_sfnt_off000090a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A8 16080 bytes
SHA-256: 3a0f8ed008c79ef5fc1e40fbe805bb4ed86c3b537cef76351acb51b29d81aea7

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