Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbd4039e6f208db…

MALICIOUS

PDF

60.6 KB Created: 2020-08-20 01:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f1f1a595a82d069c284da3e15c37650 SHA-1: f55fe91e5eb971c39dc2bb41ebf9ef39a824e253 SHA-256: 3cbd4039e6f208db56f99ae37d860bf1f386fa45dd0ab2f17ca388f23cfe3fd2
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, disguised with text related to "Animal farm student journal answers". The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, suggesting a link farm or redirection scheme.

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=animal+farm+student+journal+answers In PDF document text
    • http://files.pocketswine.com/uploads/1/3/2/8/132815882/be4e402.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/1/0431/8930/5506/files/tujomujolefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9195/1769/files/mifito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/80500638416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/polaris_ranger_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7456/5784/files/accountancy_guide_for_class_12_english_medium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8501/9801/files/wezatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/jojenifivagun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9697/7051/files/spoken_english_book_in_bengali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0077/4308/files/11722111719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/28446391425.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA124 3532 bytes
SHA-256: 54ef413800d0fd00d962e8088d66fa85c07d9e09c5a2e8ce1ae84327154658f0
font_01_sfnt_off0000adc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC7 5208 bytes
SHA-256: 9ad1ac23dbd8c047af55394e583d3a3ce1b2c13342837952a6b91bed8c193e7e
font_02_sfnt_off0000bf6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6A 11192 bytes
SHA-256: 3d8175250c51597e99aa12dacbe247476765401b36b8f7308f594840c96c1eff

Open this report in the interactive analyzer, or submit your own file for analysis.