Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0017c6a2a744ba…

MALICIOUS

PDF

39.9 KB Created: 2020-08-01 05:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a12f310b3cecc55968c579542fec02d SHA-1: 0cbe00c21305b2f2593ba0f40db2153b1e2e8b12 SHA-256: 8a0017c6a2a744bad9e0f2a2fc75879e512903901def6f1161e69ddf5430c637
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a URL designed to impersonate a Synology NAS reset notification. The document body, though heavily obfuscated, contains the target URL and references to a system reset. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the ultimate destination. The ML classifier strongly supports the malicious nature of this PDF.

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=reset+synology+nas In PDF document text
    • http://files.number1hair.co.uk/uploads/1/3/2/7/132740352/duwesemi.pdfIn PDF document text
    • http://files.living-towin.com/uploads/1/3/0/7/130776828/tibori-xulipubu.pdfIn PDF document text
    • http://files.empowerptandwellness.com/uploads/1/3/2/3/132302716/5917608.pdfIn PDF document text
    • http://files.carriecharleybrown.com/uploads/1/3/0/8/130815437/8f1299c559095f.pdfIn PDF document text
    • http://files.talknerdy.uk/uploads/1/3/1/4/131455722/woruzotiso_nalivujile_fidepinu.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/1/0433/0687/7080/files/dogudanivivakow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/51999497286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/5453853552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/lojezirepusenunafimojibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/zokuwutor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/41089033391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1594/4867/files/vizemur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6775/2099/files/31501873145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/vekoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/bujasizo.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_off00006020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 4864 bytes
SHA-256: 2858e662fceff9c9e1a12ff7c33c2e284143bde58a889082a732895f6729cdfe
font_01_sfnt_off000070d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 10028 bytes
SHA-256: cf596b3e4d2ffceed6ec9fd6d216a27202d055976a3a83648d9234b4819c4853

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