Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a858f3dc0283a9b…

MALICIOUS

PDF

58.4 KB Created: 2020-08-07 09:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6afc6c79ad110739c7017e174aef6882 SHA-1: e5e0e3fc57570cf9799f8b1600fb43d8ee92d6e3 SHA-256: 9a858f3dc0283a9be5528d53ff0ef3dd61dfb4f7da0a76421480a3027dab355c
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to '4th industrial revolution book pdf' and a URL that appears to be part of the redirection chain. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic 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=4th+industrial+revolution+book+pdf In PDF document text
    • http://rafifazu.bridgeartsproject.com/uploads/1/3/2/3/132303382/bodidapozogis.pdfIn PDF document text
    • http://files.thomasfc.com/uploads/1/3/0/7/130738719/677013.pdfIn PDF document text
    • http://files.barryneighbors.com/uploads/1/3/0/8/130874162/nowarijovitar.pdfIn PDF document text
    • http://guteme.kyler-leroux-coaching-portfolio.com/uploads/1/3/2/6/132681579/70186f4792f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4769/7049/files/42856149799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8879/6053/files/72896995378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5817/3854/files/extract_vmdk_from_ova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/fajila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/zusure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6441/7695/files/boyds_bears_values_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98690712505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/34327639463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5542/4423/files/york_air_conditioner_compressors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2053/2386/files/bedupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/66975467269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.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 3

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_off0000981e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x981E 5268 bytes
SHA-256: 5bb3c990a251a350613dcdc653fec132a2a7f193ca7c8744a4b68c275a9bd621
font_01_sfnt_off0000a9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F6 10604 bytes
SHA-256: 5201a68faa63ea4c43a95c1766789e5db7f77deddf6712c8c6d6df3153e74abe
font_02_sfnt_off0000ce37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE37 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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