Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c33637b88d139cd…

MALICIOUS

PDF

46.9 KB Created: 2020-07-28 09:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9fccf9bc805c508df2f502d458cf2679 SHA-1: 31b05bcfe97410dbcd52522cedb5286945abef92 SHA-256: 3c33637b88d139cd583e5b01605c1934818f5f56eeb0b70272c4f5b0dc6762ae
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, identified as a link farm, designed to redirect users to external websites. One such redirector URL, 'https://ttraff.cc/pify?keyword=social+emotional+learning+worksheets+pdf', is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'social emotional learning worksheets pdf'. The presence of multiple Shopify-hosted PDF links further indicates a coordinated effort to distribute malicious content.

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=social+emotional+learning+worksheets+pdf In PDF document text
    • http://files.nissajackman.org/uploads/1/3/0/7/130775295/guradarojatatos.pdfIn PDF document text
    • http://files.neighbourhoodmassage.com/uploads/1/3/0/7/130739415/ccf52.pdfIn PDF document text
    • http://files.busnbreakfast.com/uploads/1/3/1/6/131606670/piganodi.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/1/0438/5538/0630/files/xenorekadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/28828977986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/rusumiwetibuzado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/fevixoxovevabitabafolag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6469/6738/files/ruvupibuxabaxekuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/95923252159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/86585460656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/xixeraxunutazirorijive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/gitewukef.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_off00006cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 5616 bytes
SHA-256: fda7b1110e5957a0a1f8610f1abb0aa70ccccbfa3a264afa80d728d03c4a1742
font_01_sfnt_off00007fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDB 15196 bytes
SHA-256: 58be24595b2deb41ff209d2999b2e795dd7689d01d1ac1f725421e486ef5e40b

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