Malicious PDF — malware analysis report

Static analysis result for SHA-256 b681ec82a5cc31c7…

MALICIOUS

PDF

45.9 KB Created: 2020-08-18 20:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6f85587d41cedf42829afbea823ca96 SHA-1: c54f643a96d92111ec54bc30bc6a5224f8afa226 SHA-256: b681ec82a5cc31c7b6f7fec8b9c66b41f1b300fefc1834ab27114228c7deb0dd
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a form for an 'Mvat amnesty scheme 2019'. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. Additionally, the PDF contains a link farm pointing to various Shopify-hosted PDFs, one of which is the malicious redirector. The document body contains the malicious URL and a call-to-action phrase, suggesting a social engineering lure to trick the user into clicking the link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=mvat+amnesty+scheme+2019+form In PDF document text
    • http://files.jept.co.nz/uploads/1/3/0/9/130969835/bolidozopim.pdfIn PDF document text
    • http://files.mustangsbasketball.com/uploads/1/3/0/7/130776150/72582.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/1/0434/3883/3816/files/9147140446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/bedalivamen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4523/1515/files/24461278932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/20652194760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/novezixapitekewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3494/7233/files/63502160101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1030/files/zofol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/list_of_collocation_words_in_english.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_off000075d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D5 5736 bytes
SHA-256: b2ba429f26c3d04131ac903b5c91019ca400e2c71495948b0330267a8f19ba2f
font_01_sfnt_off00008946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 9940 bytes
SHA-256: ae009cefba7c22cc5b385a185039ddb5e10b518d57d5409fcef08a81c9fbd11f

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