Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c891d45278693d…

MALICIOUS

PDF

43.2 KB Created: 2020-08-26 07:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7038cea1b8d8b505b39a17714b74e8ab SHA-1: c37d1ad26f909a361d76da5e7a923c38100a9013 SHA-256: 66c891d45278693df4580ddb59a044440d3e12d17e5fa601c1c155677ee9ff41
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, disguised with text related to entertainment content. The ML classifier strongly indicates maliciousness. The primary malicious URL is https://ttraff.cc/pify?keyword=scarlet+heart+ryeo+ep+17+eng+sub+dra, which is likely used to redirect users to a 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=scarlet+heart+ryeo+ep+17+eng+sub+dra In PDF document text
    • http://files.airmicrochip.com/uploads/1/3/0/7/130776603/6adfa4.pdfIn PDF document text
    • http://files.cestagift.com/uploads/1/3/1/1/131163601/tezuxijolamokub_bozolugadajaso.pdfIn PDF document text
    • http://files.howweglow.com/uploads/1/3/1/0/131070523/wafurug_xuxovabejenoj_bovezolewek_birosa.pdfIn PDF document text
    • http://files.artnurture.com/uploads/1/3/1/4/131483214/vinotop.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/1/0435/5883/0229/files/farmall_cub_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/pijavute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3984/files/54848403793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/counter_strike_para_ifresi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/95468727239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/35209242174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/50541840681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9590/6721/files/16718221572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/mobojadarivefisibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/5788/8662/files/68190893610.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A82 4080 bytes
SHA-256: 750f2c60107e131a590280d986a309c185dad9ea69a5a4f0f25aba6359eaaf8a
font_01_sfnt_off00006900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6900 5812 bytes
SHA-256: 69b3e568c93c6e7015aaefe47911f21833df7dbcdab7471edc87b9b95f235f65
font_02_sfnt_off00007cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC0 10228 bytes
SHA-256: 99f676dd1617d1732b8d8cf78675f6f76af61f4f6a1b36d3528da61d8214abec

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