Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47da87c9e7b9a0f…

MALICIOUS

PDF

33.9 KB Created: 2020-08-03 04:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6aa02d60532dd4099b21901d6ecfa6f2 SHA-1: 34537fadf6d5c9abf5869595e6492101d9ca4282 SHA-256: c47da87c9e7b9a0f191509899c82d78e1df0fb6d89f6201861ef92518f34c88f
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search engine results, directing users to a malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=modern+control+engineering+ogata+5th+edition+pdf, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and several benign-looking Shopify URLs, suggesting a social engineering tactic to disguise the malicious intent.

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=modern+control+engineering+ogata+5th+edition+pdf In PDF document text
    • http://files.insideoutclips.com/uploads/1/3/0/7/130775498/jepekimoreni.pdfIn PDF document text
    • http://files.5rocksdistilling.com/uploads/1/3/1/4/131408432/acb4eac2f7.pdfIn PDF document text
    • http://ridewo.primariusstaffing.com/uploads/1/3/1/4/131411688/2236150.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/1/0440/6103/2598/files/79913920067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6825/1543/files/tefox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3048/4904/files/vajaxagugunufutarof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2737/3990/files/snmptrapd_conf_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/fexodutaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/93236758995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/40059924761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6331/1520/files/gadativor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/janeseto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2089/4886/files/88534470487.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 5

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_off00004749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4749 5368 bytes
SHA-256: 34c30da622f3fb8dd4a02f68014fc908666a617ad26eb10e09db1d933bff40ad
font_01_sfnt_off00005998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5998 9640 bytes
SHA-256: c7a7af6b514facedc4bf85f4af74f9d1415c337d49df2d05d695a3cd0f6c5e8c

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