Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f914e21e056dc2…

MALICIOUS

PDF

46.3 KB Created: 2020-08-06 13:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97d19d8fcc603d451b70e9cda3dba879 SHA-1: d5513ff0fd66843408bfa64de2f584fb0c8a5470 SHA-256: a8f914e21e056dc24a414bb61ba3df60367f88f6625231e87acf7bda1e815e01
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=practical+skills+in+chemistry+john+dean+pdf, which is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the book title and the malicious URL, reinforcing the lure. No scripts were extracted, but the PDF structure and link farm indicate a social engineering attempt to drive traffic to malicious infrastructure.

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=practical+skills+in+chemistry+john+dean+pdf In PDF document text
    • http://votokowu.aretemediaacademy.com/uploads/1/3/1/4/131407995/59f192.pdfIn PDF document text
    • http://files.midwifeyork.com/uploads/1/3/1/4/131452778/bilej.pdfIn PDF document text
    • http://files.iplaw1.net/uploads/1/3/1/4/131437423/9ebee4.pdfIn PDF document text
    • http://files.houseofblackart.com/uploads/1/3/1/3/131383743/1357375.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/1/0434/4669/8146/files/50729690095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/sujomojawefeganaxiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7406/8390/files/turasapitapiwuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/26492586905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/mikibelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/dokexiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5878/files/folotetewenarewetabason.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/52308431058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3452/5352/files/totezaluwowamojalisivojev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/80974606154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8446/3784/files/zend_avesta_italiano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/88963763967.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 4

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_off000073a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A7 5636 bytes
SHA-256: 1bfd445fb1ff7800371c07f7b7293be5810d9c4412197f7b3da665e8732d59b3
font_01_sfnt_off000086b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B2 10856 bytes
SHA-256: a97fbf0cf2b462e3834cfcec02146108eb1cb6e04cd336484e5b4974d0a867db

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