Malicious PDF — malware analysis report

Static analysis result for SHA-256 28984c8c350e34ab…

MALICIOUS

PDF

44.2 KB Created: 2020-08-19 02:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3833cab3956eeaaa6864903f6bdf47aa SHA-1: f7bcb9be53abd3296c018b1bc668928b61aa6030 SHA-256: 28984c8c350e34abac8441f9a99c0ba0cce7fbc326121fe348d439fb8125a8c5
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm. One of these links, 'https://ttraff.cc/pify?keyword=apa+style+manual+7th+edition', is known to redirect to malicious infrastructure. This suggests the document is designed to lure users into clicking malicious links, potentially for phishing or malware distribution.

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=apa+style+manual+7th+edition In PDF document text
    • http://files.worldwidecycles.com/uploads/1/3/1/0/131070173/dufedor.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/1/0428/2259/8823/files/77294608291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/20930935370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/5113314067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/19182789812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/80284292009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/21432247258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/22269679050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/97199294654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/87903135531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/16703423115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/88244509357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/1761018966.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 3

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_off00006f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F06 5272 bytes
SHA-256: 8be4e04131683e5ae3615ccb0551f3a67fdafb1c89bfc9ff6f2e16d0d3825fd5
font_01_sfnt_off000080da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DA 10304 bytes
SHA-256: 232bd9f605cf8f8753a4f00b92380b5e4136dcec8c4869c26a8e6fdbf8b0186e

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