Malicious PDF — malware analysis report

Static analysis result for SHA-256 8528cc87ae8b853a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-08 03:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 031c38a85f02e58ab2d0f52b90a749a3 SHA-1: 27850507126e2e2f3c8c0d792d11aa97155a2a51 SHA-256: 8528cc87ae8b853a1b74365820820e316d95a81f32c2f5c76455b9c05a4fa8bf
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as document downloads, but they redirect to a malicious SEO link farm. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains references to the redirector and benign-looking Shopify URLs, suggesting a phishing or scam attempt.

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=summary+of+the+poem+the+road+not+taken+pdf In PDF document text
    • http://files.lifecycleaquatics.com/uploads/1/3/2/7/132740350/fiboxeposaz_mogegagas.pdfIn PDF document text
    • http://files.envisiononeness.com/uploads/1/3/1/0/131070561/1388295.pdfIn PDF document text
    • http://files.jwphotogallery.net/uploads/1/3/0/7/130775633/9056463.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/1/0435/7314/9859/files/joint_munitions_effectiveness_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/wurisurefalanekapofabaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4691/8551/files/social_factors_affecting_consumer_buying_behaviour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/42263856378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0081/6028/files/install_compass_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/fuxobujorokapefinul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/34945464334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0035/6251/files/48496512847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/89014097941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3555/files/82959306430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/64843624972.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 8

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_off000062bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 5340 bytes
SHA-256: 7c27c0cf6c1dc42be02acc6dcdfd5244d0c048f8b4f58664fe8f870c809385a7
font_01_sfnt_off000074c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C3 9772 bytes
SHA-256: d90f92771093b27087587e3086150196e3772c8f1c32882cc12e37758142a6bf

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