Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c8626d7ac5f659…

MALICIOUS

PDF

37.1 KB Created: 2020-08-07 01:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 07aa57ebe5450c9047a303c0c4bf9876 SHA-1: 575cbedfe1b902e6e0d8b3a956d024cf16cc28b7 SHA-256: e8c8626d7ac5f659db23a15ae6d15801be7fb3ae121726d9a3ab97014d8ccac3
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a prominent URL pointing to a redirector, suggesting a lure to external malicious content. No scripts were extracted, but the PDF structure itself is weaponized to deliver malicious links.

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=bsc+math+calculus+book+pdf In PDF document text
    • http://files.simixlaundrydetergent.com/uploads/1/3/1/3/131380001/9599450.pdfIn PDF document text
    • http://files.oliosmarket.com/uploads/1/3/2/7/132740637/ruxofodoz-lumupasoz.pdfIn PDF document text
    • http://files.pelsonfamily.com/uploads/1/3/1/3/131384414/zozep-lofimejetoki-muzasawalub.pdfIn PDF document text
    • http://files.apostlerontoliver.com/uploads/1/3/1/3/131380107/757c318efc7d.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/1/0437/8463/4530/files/43639114485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/26604791788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/65647450525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/15335398505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29876283886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/9374694738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/anatomy_and_physiology_2_final_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/38786808486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4131/5223/files/7553604571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/zabuwuzeragezasazob.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_off0000531e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x531E 5552 bytes
SHA-256: 09d2187774eed400ac64a5067b591d80bdb7d9de21752788bfe0f9e7db8e94a8
font_01_sfnt_off000065da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 9948 bytes
SHA-256: c3f959ce8647537b6ecd154c102a03503de126fa0c6708c282b2b273ddf2d61e

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