Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca8e68ec4bd51b9…

MALICIOUS

PDF

38.8 KB Created: 2020-08-26 17:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 911941007429e71ce75b812c5b16348f SHA-1: 1f3d47cf22d021a308885b789f10c105700f8e18 SHA-256: 4ca8e68ec4bd51b994ccc3f65189a66616ab13c797bc59d4306fbdc28b264a78
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=solid+liquid+gas+worksheets+pdf, which is likely the primary lure. The PDF also contains a mass external PDF link farm, with many links pointing to benign Shopify domains, likely an attempt to mask the malicious redirector. No scripts were extracted from this sample.

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=solid+liquid+gas+worksheets+pdf In PDF document text
    • http://files.joesoftball.net/uploads/1/3/1/3/131398278/6a58ca743018.pdfIn PDF document text
    • http://files.makeitrainbitcoins.com/uploads/1/3/0/8/130873822/sibuvo-wobakazuze-xibon.pdfIn PDF document text
    • http://files.studioofcreativity.com/uploads/1/3/1/3/131384401/5656979.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/1/0434/0409/9740/files/autodesk_123d_design_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/biography_of_bhagat_singh_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5270/3645/files/bedaninawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/54016482566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/gossip_girl_cecily_von_ziegesar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/ruliguvogasadokovisivigob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/90399769513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/44604037927.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 7

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_off00005948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5948 5688 bytes
SHA-256: f16c6d99bcbff921ecbda6b718f8f0548aef58fe9de2b6f38fb9409ea22916e6
font_01_sfnt_off00006c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9F 9996 bytes
SHA-256: 28da710e96630af5c73f79cf0b809e17f723f930279b9ad5ea06c0252214e4d9

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