Malicious PDF — malware analysis report

Static analysis result for SHA-256 e478b20e9908d7ab…

MALICIOUS

PDF

49.4 KB Created: 2020-08-13 12:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39906f4c05855567c94bc078fcbec18b SHA-1: 74903c269c43f39c3b5c80621901b6d9a8f18bfe SHA-256: e478b20e9908d7ab02b9e598dd9fd0426e8f6ce4e4776bbf594f1a2bd80ff04f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm strategy, likely intended to drive traffic to malicious sites. The ML classifier also strongly indicated 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.com/wb?keyword=ariens%20lawn%20tractor%20manual In PDF document text
    • http://files.melanatedmama.com/uploads/1/3/2/3/132302960/148e1.pdfIn PDF document text
    • http://kutel.16thavefringe.com/uploads/1/3/1/3/131383483/9e64da5.pdfIn PDF document text
    • http://files.smokymountaintax.com/uploads/1/3/1/0/131069789/vudofirenosago.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/1/0431/7193/8461/files/getejesowute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/fodadeligito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1348/0343/files/62595230938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/31045018908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/zejozepepafekijegemopib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5767/5431/files/satellite_kevin_gates_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0313/1542/files/64144854990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/lifinobukuwimiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/godedivudiluxabigujuduk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/testing_tool_selenium_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/tifuvusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9540/0349/files/47042230883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/zukomax.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 4

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_off000083e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E7 5024 bytes
SHA-256: b16fbd318066f5440126177c0c1ffa04c1ef5a670eca5b401d7f212f28ad735a
font_01_sfnt_off000094e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E6 10496 bytes
SHA-256: 0ed295044fe361399ed906b11963b2b4fc91757457e4b9842883e9a22305322a

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