Malicious PDF — malware analysis report

Static analysis result for SHA-256 826666d720f9b090…

MALICIOUS

PDF

35.9 KB Created: 2020-08-19 19:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c95bac05b875908011288a3bd15d4fb6 SHA-1: f86c76c8e139dff79e94ffbedac078b6ee23306f SHA-256: 826666d720f9b0909956330331ff682a7981d1c09313a3b1debc9c9f8d47bbd9
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This redirector is likely used to obscure the final destination, which is probably a phishing page or a malware download site. The document body, though heavily obfuscated, contains the redirector URL, suggesting an attempt to disguise the malicious intent as a free download lure.

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=kampa+groundsheet+pegs In PDF document text
    • http://files.stutteringacademy.com/uploads/1/3/1/3/131380892/4928ff5e5.pdfIn PDF document text
    • http://files.nvarealestateresource.com/uploads/1/3/0/7/130738823/5a54a45142.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/1/0430/7841/8583/files/72537625703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/50777989130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/michigan_dnr_hunting_guide_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8520/8483/files/ios236_installer_v8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9712/0154/files/2608635861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/xelojaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/geometric_design_of_highway_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/brachial_plexus_injury_rehabilitation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/velaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/vexev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5985/3977/files/wijobevodutivivoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000431a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x431A 4016 bytes
SHA-256: ced76f83a4bd0220083fc9e88c06617ff5b26e7ec672c345be1a823d8a2e97a1
font_01_sfnt_off0000516a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x516A 5312 bytes
SHA-256: 32c0ab0941b9ae02f62428d6dc549be732b00141e6c831c9643afa751d7d0871
font_02_sfnt_off00006350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6350 9256 bytes
SHA-256: 49b28d3aebf5fa49979ff0f994982e718f146a620508146825375c13f30ce31c

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