Malicious PDF — malware analysis report

Static analysis result for SHA-256 1864621bbacd02f2…

MALICIOUS

PDF

43.4 KB Created: 2020-08-18 18:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d395ca8a527f60ec7820bbb45bae5bf SHA-1: 47c4eee95e2e7da78de9672615520d7312426469 SHA-256: 1864621bbacd02f23452dfb0bdadcd62da837d59df96ed6d78a877ffcec3ae39
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector service, which is a common tactic for phishing and malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure further supports a malicious intent. The primary redirector URL is https://ttraff.cc/pify?keyword=ttd+2018+calendar+pdf, which likely leads to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ttd+2018+calendar+pdf In PDF document text
    • http://files.oursaviorsdevilslake.org/uploads/1/3/2/7/132712235/bdb0b.pdfIn PDF document text
    • http://files.brightsidecbd.com/uploads/1/3/1/3/131382430/wasexe.pdfIn PDF document text
    • http://files.ancientcraftstudio.com/uploads/1/3/1/6/131607374/f068e9693c6.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/1/0433/8063/7859/files/30130990943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/fudiliti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/6791015861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/24296200638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7804/8162/files/biochemistry_by_lehninger_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/konapufose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/fruity_loops_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/libros_y_registros_contables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/4755610298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/wobebewagexerosetezuwogaj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691C 5440 bytes
SHA-256: 85365305974fe1f4a7a33da3135d062ff77d4dbe293f49050fd4395cb243f2fb
font_01_sfnt_off00007ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA8 11088 bytes
SHA-256: 2463ae5b208c38286da6607401b94d5e0fc363e4966f1a6d080d102fafe4d124

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