Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16bf1c825d01159…

MALICIOUS

PDF

41.1 KB Created: 2020-08-08 20:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c3c5621057a77c82534809993fb5a0b0 SHA-1: a103a05f03d9e687b72494a4732ef9fad2381b04 SHA-256: e16bf1c825d01159693a6e958401d87822b5452d6e36450565091f4df52c2516
194 Risk Score

Malware Insights

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

The PDF contains a link farm of numerous PDF files hosted on Shopify, with one primary link pointing to a known malicious redirector. This suggests a social engineering attempt to lure users into clicking through to potentially malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=cryer+international+criminal+law+pdf In PDF document text
    • http://files.rafikibiblestudy.org/uploads/1/3/2/6/132681625/48f73736d7f.pdfIn PDF document text
    • http://xotixota.jenningsrn-to-bsn.com/uploads/1/3/1/3/131380485/b3f924400a326.pdfIn PDF document text
    • http://files.olibarnewrochelle.com/uploads/1/3/2/6/132695568/f99f0cd9d31.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/1/0437/2296/5160/files/allluia_le_seigneur_rgne_partition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/11109376406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4831/2738/files/adenocarcinoma_de_prostata_tratamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/stardew_valley_ghost_sounds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/61131082743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/list_of_statistical_tests_and_when_to_use_them.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/govin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/99793287489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2082/7300/files/54971820460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/56799849584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3583/6059/files/63268962874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/82870950542.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_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 5220 bytes
SHA-256: 571487d4a0cfbf9f57c155f436ddd0bcb05f30c4972b7c853ae24f9eb3189cab
font_01_sfnt_off000073a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A4 10648 bytes
SHA-256: e37a18bb4316bc1aa72bf934d5b5808851d8ab36249808875127b3084ce7dd3c

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