Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca16ae9346e560a…

MALICIOUS

PDF

32.0 KB Created: 2020-08-15 16:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f8a59076cb73a6d8f265acaebcd7e0d SHA-1: 8c1d9d0865977abdae5d3054dc8de12f1639cc27 SHA-256: 4ca16ae9346e560aa622f9b7eb60887ecfc2d19b2aef9a4de70a172c52e77477
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used to redirect users to malicious sites. One such link, https://ttraff.cc/pify?keyword=kadita+build+guide, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links hosted on cdn.shopify.com, suggesting a link farm designed to distribute malicious content. No scripts were extracted, and the primary attack vector appears to be the exploitation of user trust through malicious links.

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=kadita+build+guide In PDF document text
    • http://files.ecuadorforestofclouds.org/uploads/1/3/0/7/130739120/a6f1d3ed833.pdfIn PDF document text
    • http://files.abnormalhunter.com/uploads/1/3/1/0/131069934/3672325.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/1/0433/0687/7080/files/xigazisamakolomomabixefox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/fifoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/91428856532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4633/7703/files/naxulejotagekozawojotomow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/91782401644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8394/6397/files/13049478423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/11564724591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0857/9993/files/5337339429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2803/7287/files/2894978301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/53825608477.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 2

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_off0000447e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x447E 4828 bytes
SHA-256: 7e460e47d80f6443d0cd1a3eea4e8b1798bc605dbb6cdb4ece5a2890640f4557
font_01_sfnt_off000054fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54FE 9100 bytes
SHA-256: 0c57aeaca6188a9a615021d917f162f45130dcb1fa02e7555319703bfcfb8548

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