Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc671bb4e8a82dc…

MALICIOUS

PDF

51.1 KB Created: 2020-08-06 23:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fffb59dc06cdbd83d52d52f14210d29c SHA-1: 00bc5745fa1f33a7509a64b06bc6367351682518 SHA-256: ebc671bb4e8a82dcb9b1bad84874108af616074feb9b8b186dd50d455e61c83c
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The embedded URL points to a redirector that likely leads to further malicious content or malware. The document body, though heavily obfuscated, contains text related to 'acca f2 past questions and answers pdf', suggesting a lure to trick users into clicking the malicious link.

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=acca+f2+past+questions+and+answers+pdf In PDF document text
    • http://files.electroskan.net/uploads/1/3/2/7/132740277/4575073.pdfIn PDF document text
    • http://files.karlabeck.com/uploads/1/3/1/4/131438538/5285313.pdfIn PDF document text
    • http://files.cybersecurityinc.net/uploads/1/3/2/6/132681938/natuwafegaga.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/1/0427/8052/4710/files/39251300403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/41906210919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7264/7331/files/lund_and_browder_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/60674142395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/70524136808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/zerekalowigufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/28139647201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/voxezamisopasiroluwogeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/2836/7771/files/human_anatomy_and_physiology_laboratory_manual_11th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/niwukubuj.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_off00008938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8938 5456 bytes
SHA-256: c53ed9f84d1664d162d316ad8cf9d622a20cf894ee296c88bff7dc308a15961c
font_01_sfnt_off00009bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF4 10444 bytes
SHA-256: 1f83e2660e2605cc386648e34da1daf8d8734976755570ba2f074a19d799ed36

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