Malicious PDF — malware analysis report

Static analysis result for SHA-256 d636f7409384e4fc…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 17:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5df66cc137d199e37a6214beb97afc2e SHA-1: 7b6785e3987abf3156adaa0442817b314e27eb88 SHA-256: d636f7409384e4fc0b84e83b95368321bb0510742efffb6a3a22e8cadc589251
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a direct link to a known malicious redirector at `https://ttraff.ru/pify?keyword=basic+mathematics+for+astronomy+pdf`. This suggests the document is designed to funnel users through a series of redirects, likely to a phishing or malware distribution site. No scripts were extracted from this sample.

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.ru/pify?keyword=basic+mathematics+for+astronomy+pdf In PDF document text
    • http://files.hilaryhachey.com/uploads/1/3/1/6/131637656/zenugun.pdfIn PDF document text
    • http://files.skylinekennelclub.org/uploads/1/3/0/8/130874015/tevepepa.pdfIn PDF document text
    • http://files.rothbartnorthshore.com/uploads/1/3/1/4/131482819/e728a687.pdfIn PDF document text
    • http://files.snyder-pharmacy.com/uploads/1/3/1/6/131607712/mimalopedurijixolu.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/1/0432/1725/6603/files/89551127913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/58638968113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/both_and_neither_nor_either_or.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fenajowogotuxukat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3303/2864/files/xavijad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/78809450679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/temple_of_elemental_evil_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/unity_lerp_rotation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/28366105861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/osu_whirecat_skin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/41299683204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6902/1089/files/27522534702.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_off0000621a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 5516 bytes
SHA-256: fdb8ca3dc40a1225c8d647ecc4e6beb20a4ca0b7792a2a081b9c6898163808a9
font_01_sfnt_off000074b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 10420 bytes
SHA-256: df6da942b1cd3fadfea00386c60918cd16d41f1f41c4aa815d3f0fb3bf63dfd7

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