Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5565977e3397ee9…

MALICIOUS

PDF

43.0 KB Created: 2020-08-20 18:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 19e051678f3ae166ed8ad90ec0f1a9f5 SHA-1: 611c7a968147b562649e752dc2fa0a23d27f64e1 SHA-256: b5565977e3397ee957aefc85d0cfd608f581e32f4ed2a2fed6afdf6ebfa4cc60
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=loy+krathong+festival+worksheet+pdf', likely leads to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=loy+krathong+festival+worksheet+pdf In PDF document text
    • http://files.thecivicexperience.com/uploads/1/3/2/7/132740930/1420537.pdfIn PDF document text
    • http://popote.brandedcowboychurch.org/uploads/1/3/1/6/131606365/befulokoke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/nufigezove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7530/3592/files/21513145760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/kubonuwagurosagirik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3545/1804/files/41964860055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/fotizam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9113/0536/files/preeclampsia_management_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/netozowuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/fadoziwukujerorenusemux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/rufivolasobifedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/43009351764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8088/4129/files/vimibipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/motor_vehicle_bill_of_sale.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 1

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_off00004962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4962 5560 bytes
SHA-256: e118d9b33ffaed5b74b8785f5f283e919e6f85ccf2e4b01c2d1270657aab8110
font_01_sfnt_off00005c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C64 12348 bytes
SHA-256: 253011e12444ed0bf562a52f29eb1febf59e02eebd16663702b7b0b8df99327e
font_02_sfnt_off00007db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB1 9624 bytes
SHA-256: ea073792f62349a581407fa49936fff55b007fd70425ebb3e255338b022148e2

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