Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6e60dcc88cc9f5…

MALICIOUS

PDF

48.5 KB Created: 2020-07-29 03:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c0359ca7d87114168911e522d00c148 SHA-1: 7396272007dd80ef7ff5254e281495dc228969e0 SHA-256: 3b6e60dcc88cc9f5fa77209fd83e03cf9c85e3f656f8c40f458c877fd9c205df
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users. The primary redirector URL is associated with malicious activity. The document body, though heavily obfuscated, contains text related to 'BBC learning English PDF', suggesting a lure to trick users into clicking the malicious links. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=bbc+learning+english+6+minutes+pdf In PDF document text
    • http://files.kkstechtips.com/uploads/1/3/1/6/131637190/26ec8b48f71.pdfIn PDF document text
    • http://files.donandmargieabroard.com/uploads/1/3/1/0/131071076/f2b818fc74ed0.pdfIn PDF document text
    • http://files.thebyrdgallery.com/uploads/1/3/0/7/130740536/6a300b1bd14df.pdfIn PDF document text
    • http://files.lewinenterprises.net/uploads/1/3/0/8/130874086/1184696.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/1/0434/3005/2005/files/11060527445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/63488014649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/lizemapawabamumed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1916/6119/files/vanoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9945/3608/files/23181975134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/wuvogamababobomeper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/feginaviwis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/10277756219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3234/4736/files/93955144587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/89334295497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/nirabubezozuguxulovorerov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/subevolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6346/files/10130645490.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_off00007ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 5684 bytes
SHA-256: 0cb3ad8cafed5abfe7850f9d48ee45d7ed9036d08318cadd9ca9d6c20c18fd49
font_01_sfnt_off000091ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91EA 10096 bytes
SHA-256: adac0e687b2511654064b87c549f89865df475256872dd7c256768ba9a633b63

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