Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7a9c4f6e3916ee…

MALICIOUS

PDF

40.1 KB Created: 2020-08-20 21:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c6c8f5842abd2db291e851828ca6b4e1 SHA-1: 085a70092137729eb4e3b4d63f29df863994bbe4 SHA-256: 6b7a9c4f6e3916ee532b48d529115e5a6c3653593a201b4f6630fb7f24f3d99f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains a URL that appears to be part of this lure. The ML classifier strongly indicates maliciousness, and the heuristics point to a link farm and redirector strategy.

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.ru/pify?keyword=weather+report+of+chanho+ranchi In PDF document text
    • http://files.norcrosstrack.com/uploads/1/3/1/3/131379117/dfdb9ccb7.pdfIn PDF document text
    • http://fowolora.gailgloverfaust.org/uploads/1/3/1/4/131453119/jemav.pdfIn PDF document text
    • http://files.gtmgc.org/uploads/1/3/0/7/130739379/3751084.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/1/0428/3914/6662/files/57956807402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/ditusuzijizalevati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/ascomycete_fungi_of_north_america_a_mushroom_reference_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/vifivexizaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/integral_calculus_by_shanti_narayan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2718/3269/files/39400523610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2439/1071/files/gowun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/80080918373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2439/1067/files/37017860840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/tuffcuff_jr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/hp_dv7_driver.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_off00005fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 4908 bytes
SHA-256: 36b8f7f2ee3cd2798b55036a04a523271d6afdc640fed63cbae0685d5a9c2a27
font_01_sfnt_off00007065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7065 10252 bytes
SHA-256: 53b8afcaf41921eaa9036566293c8a88714aabd0f191a19c20d1f20b9035de63

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