Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21355e017603fb8…

MALICIOUS

PDF

40.5 KB Created: 2020-08-02 09:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb8a6a8dd2363e61f6eaa7658079c907 SHA-1: 8217c363d87d5d228b608352ae0f443833aa5c3c SHA-256: d21355e017603fb863862187822014693b444bdbe363b629582349aec28cc0fd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm or SEO manipulation, embedding a large number of links to external PDF files. One of these links, https://ttraff.com/pify?keyword=ad%2526+d+2nd+edition+monstrous+compendium+pdf, is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves luring users to malicious infrastructure through these embedded links.

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.com/pify?keyword=ad%2526+d+2nd+edition+monstrous+compendium+pdf In PDF document text
    • http://files.simplybeautifulpg.ca/uploads/1/3/0/7/130740050/vonibomew.pdfIn PDF document text
    • http://files.uschessschool.com/uploads/1/3/1/3/131380894/811adf209e846.pdfIn PDF document text
    • http://files.rampensau.training/uploads/1/3/1/4/131409463/buzun.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/1/0428/9835/8432/files/58014629257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/56091473271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/sepix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/min_to_seconds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/46045460864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9240/1571/files/lamad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/38862181646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/faxitelit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/18318941575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2039/3380/files/dna_amplification_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/josekareboloxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/banolegizemexuxitupibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/64488441421.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 2

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_off000064f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F0 4288 bytes
SHA-256: 5be54ff6fc51febc4311e10609cf5ee009aec6b64122ef758e69e2d515410c6e
font_01_sfnt_off00007388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7388 10040 bytes
SHA-256: d718b36c8b3016938932bb64de084bf19035ae8412f1279482ee56e22aeac792

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