Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9501018c165a9b…

MALICIOUS

PDF

48.2 KB Created: 2020-08-12 15:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c3de57c2778a294f981358bfe0f5c0ab SHA-1: ae55c7dd2995212f04e3df39ea19b88e561d66c5 SHA-256: 0f9501018c165a9bae6183670b1897d24c44f6297eb1e87699121f34480a53e5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, but one prominent link redirects to a known malicious domain. This suggests a link farm or SEO poisoning tactic to lure victims with a fake "Ansi c textbook pdf" download. The ML classifier strongly indicates maliciousness, and the embedded URL is a critical indicator of compromise.

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.ru/pify?keyword=ansi+c+textbook+pdf In PDF document text
    • http://fewope.unitedmarinesystems.com/uploads/1/3/0/9/130969679/740856.pdfIn PDF document text
    • http://files.rost-collage.com/uploads/1/3/0/7/130775197/zebonilevi.pdfIn PDF document text
    • http://files.pdkmusic.com/uploads/1/3/1/3/131383541/jijodi.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/1/0430/9375/4009/files/kakujitamijokapuxalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2933/0082/files/betemujapedubigotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/dufux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6878/4791/files/masuterolufojonede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/vertical_center_css.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/batch_production.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/chimie_anorganica_nenitescu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/45112015430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/wesugalofaxaduzovajukido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovogosiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1263/5298/files/rikuxoramanowagup.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 5

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_off00007f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F04 5072 bytes
SHA-256: 931e1ca52c9b8b29cabf7654c77589cee4f758bef10110712ae3542848bbbf54
font_01_sfnt_off00009055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9055 10588 bytes
SHA-256: 74899771d1e6c881eb5011ad189ea61f7a4134bdcd4bd221ef8faf413b1389fc

Open this report in the interactive analyzer, or submit your own file for analysis.