Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa16a28c5fb55029…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 00:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b9de5465f5f9575dd9766f4d9a771c1 SHA-1: 381b19fb38ed71c414bff4640cbe3fafa7805aba SHA-256: aa16a28c5fb550297a69d8a87895210e2e8dd0aee50603173fcdcf074b9c2f66
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=cassese+international+criminal+law+pdf', which is flagged as a malicious redirector. This suggests the PDF is designed to act as a link farm, potentially leading users to phishing or malware download sites.

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=cassese+international+criminal+law+pdf In PDF document text
    • http://files.dflcd2.net/uploads/1/3/0/8/130874485/pejubapiwam.pdfIn PDF document text
    • http://files.technicalfireanalysis.com/uploads/1/3/2/6/132695556/7073251.pdfIn PDF document text
    • http://files.aimusa.info/uploads/1/3/0/7/130739962/3573710.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/1/0433/8909/1998/files/augusto_roa_bastos_cuentos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/56070942903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/54786689519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2246/6720/files/fepolibiwelanegova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/54982969913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/42260880693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/32365038269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/siege_of_bexar.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_off000061d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D8 5296 bytes
SHA-256: 52b8a84c140e61bbbac11eb7317a4ac301518872c9d678b1df3df593dd528a27
font_01_sfnt_off000073d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D1 10324 bytes
SHA-256: f58345a0b54516c8d3f2a1dfc7737d32266691527bad8e03f6984ca0a358d30f

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